Median of the data set is the middlemost data in the set. To find for the median of a set, arrange first the numbers from least to greatest (or greatest to least will do). Then, if it has an odd numbers in a set (3,5,7,9,11 etc), you can only look for the middle of the set. If it has even numbers in a set (2,4,6,8,10 etc), then, just add the two middle datum/ numbers then divide it by 2.
In your equation, it is already arranged from least to greatest. Since it has odd numbers (9 numbers) in your data, the answer would be 87. (Four numbers is lower and four numbers is higher).