What is the ruling for someone who forgot the Fajr prayer and remembered it after the Dhuhr, Asr, and Maghrib prayers?

Whoever forgets a prayer must pray it immediately upon remembering it, for the Messenger of Allah, peace and blessings be upon him, said: "Whoever forgets a prayer or sleeps through it, its expiation is to pray it when he remembers it." So, if someone forgets the Fajr prayer and does not remember it until after the Dhuhr, Asr, and Maghrib prayers, he should make it up immediately, and by doing so, he will have fulfilled his obligation.