What is the last step on the process of getting a bill passed

stages by which a bill becomes law-

(3rd stage - )

Third reading

the bill is drafted finally and after suitable modifications suggested by the members. then it its complete form it is put to vote. if the majority approves of the same, it is passed. the bill goes to other house where similar procedures may be adopted. the bill then becomes an act.

AND ALSO

in ordinary bills - once both the houses pass, it goes to the president of india. he or she sighns it and it becomes a law. president can send the bill back with suggestions. if the parliment returns the bill back to the president with or without changes, the president has to sign it and it becomes a law.

in money bill lok sabha introduces the bill and rajya sabha can only make suggestions. the bill it passed to the president and he or she has to sign it and it becomes a law.

therefore president signs the bill to make it a law.