The parent of three daughters has life use of property. One daughter deceased life user was only parent living. Is he entitled to her share of propert

I do not understand the question.  If the parent has a life estate and is still alive, they continue to have exclusive use.  If one remainderman dies during the life estate, what happens to her share will be determined by the way the deed is drafted, which I would need to see.  There is no legal presumption.  I could be any way.