What is the share of each heir from the estate of a father who passed away, leaving behind five sons, four daughters, and two wives (one of whom passed away before the father and is the mother of the children), knowing that the grandparents and parents are deceased?

The method of dividing the inheritance cannot be explained until the heirs are enumerated without any ambiguity. You mentioned that there are fifteen male heirs and ten female heirs, and the heirs can be enumerated using the provided link. If we assume that the man left behind only his wife, his five sons, and his four daughters, then his wife receives one-eighth due to the presence of a lineal descendant, as Allah Almighty says: "But if you have a child, then for them [the wives] is one eighth of what you leave, after any bequest you [may have] made or debt." The remainder goes to the sons and daughters by way of ta'sib (residuary heirship), with the male receiving the share of two females, as Allah Almighty says: "Allah instructs you concerning your children: for the male, what is equal to the share of two females." The wife who died before him receives nothing, as the deceased does not inherit. The inheritance is divided into sixteen shares: his wife receives two shares, each son receives two shares, and each daughter receives one share.