Based only on these excerpts, can you trace the journey of Dixit and Madhavrao from the moment they decided to leave for Shirdi until they arrived at Kopergaon?

Certainly. According to Chapter 51, after the matter of the portrait was settled, Madhavrao and Dixit set out for Shirdi. That night, after dinner, they went to the station and bought second-class tickets for the ten o'clock train. They found the second class was full, but a train guard, who knew Dixit, arranged for them to sit in first class. The journey itself is described as very happy, as they sat in the train and talked about Baba to their heart's content, with Madhavrao narrating stories. This happy journey passed quickly, and as recounted in Chapter 51, the train eventually reached Kopergaon, where they got down with immense joy.