Difficulty in comparing same measure but different values

Sure, sorry about that. 

- Here's an example of my main data base:

In this case, i'm getting only data for "course1", but there are data for another 11 courses as well.

i know that today (august 6th for example), my course 1's progress is "3,95%", i need to get the "exact match or next larger item", in this case would be "4,1%" 

- Here's the sheet that i need to have at the end:

But these values are going to change untill the end of my "campaign", 'cause everyday is a new % progress for each course.

After i have this final sheet, i can check how many enrollmens i had at that moment in time, and compare both campaigns equally.

Hope this makes a better understanding, let me know if it's clearer now.

Thank you!