Daughters Equal Share In Ancestral Property

My grandfather passed away in 2011 and my father passed away in 2018. My mother and I are residing in my grandparents' house since I was born. We are a joint family with 4 coparceners. Two brothers and two sisters. Grandpa did not give power to anybody. The elder coparcener is trying to share the property unequally by giving the least amount of share value to the last sister. Is it a legal practice to share the property unequally?