Ruling on making up for what is missed of Salat-ul-Kusuf

Q: Can a latecomer who caught up three Rak`ahss (units of Prayer) of Salat-ul-Kusuf (Prayer at the time of a solar eclipse) but missed one, make up for it, or just perform Taslim (salutation of peace ending the Prayer) with the Imam? Please, provide us with the answer! May Allah reward you with the best!

A: Latecomers who miss a Rak`ah of Salat-ul-Kusuf have to make up for it, because they missed the Ruku`(bowing) which is the criterion of catching up the Rak`ah. (Part No. 7; Page No. 169) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.