You need to transplant this guy into a pot 14" in diameter and the same height as this original pot. Purchase a clay pot, potting soil in a bag without fertilizer or water holding gimmicks added, a saucer, pot feet or pieces of 1/4" tile to lift the bottom of the pot off the surface of the saucer
No rocks or gravel at all at the bottom of the pot beneath the soil and above the drain hole. Add nothing to the potting soil. Plant it at the same level the plant enjoys right now ,leaving an inch between the surface of the soil and the rim of the pot. Soak your new clay pot, and scrub with a bit of bleach, rinse before transplanting all three of these plants together in the new pot.
Do you have a covered patio or porch? If you do, take your plant out of doors to have a summer vacation in the shade without any chance of direct sun. Indoor plants get more light on a covered porch than in the sun of the patio doors inside the home. I do this with all indoor plants. I hose them down wash all the accumulated dust off the leaves, give them their little hit of OSMOCOTE 14-14-14- fertilizer for the YEAR.
Get them back indoors before any chance of cold evening temperatures in the fall. This doesn't take acclimation time at all. But made my plants look better than those in any nursery or store or healthier than when I first purchased them. Indoor plants are called long term perishables for good reason. This summer vacation on a covered porch does phenomenal resurrection of slowly dying indoor plants.
I would cut back the lowest, older leaves. Those that are shaded by the upper leaves and have started turning yellow. I see only 3 or 4 that need to be taken off the bottom.
This plant might just surprise you in a big way! Water the newly transplanted palm(s) and pick the potup with plant and soil and water. Feel the heft. You'll quickly get used to this. When that pot is heavy don't water...when you are able to feel a definite lightness, that is the time to water. Never allow water to sit in the saucer, always use those pot feet (pieces of tile are cheaper). If you are on city water, I would purchase gallons of DISTILLED water to use instead. Well water from a friend with well water?
I hope this helps, please let me know if I did not explain clearly. Take a look closely while you have the time, at the stems and leaves. Check for scale, spider mite. Very common.