How did Sai Baba and Gajanan Maharaj collaborate to help Ratanji with his problem of not having a son?

The provided excerpts from Chapter 14 do not describe any collaboration between Sai Baba and Gajanan Maharaj. In fact, Gajanan Maharaj is not mentioned at all in the text. The story focuses on a Parsi merchant named Ratanji who was distressed about not having a son. His confidant, Das Ganu, directed him to visit Sai Baba in Shirdi. Ratanji followed this advice, went to the Masjid, and presented his troubles to Sai Baba alone. The narrative in Chapter 14 details Sai Baba's practice of asking for Dakshina from visitors, but it makes no reference to another saint collaborating with him.