Finding the Fourth Proportional to 8,715.89, 13,075.89 and 2,872.50

Step by Step Solution

1. Step 1: Write the proportion equation
   8,715.89 : 13,075.89 = 2,872.50 : x
2. Step 2: Convert to fraction form
   8,715.89/13,075.89 = 2,872.50/x
3. Step 3: Cross multiply
   8,715.89x = 13,075.89 × 2,872.50
4. Step 4: Simplify right side
   8,715.89x = 37,560,494.03
5. Step 5: Solve for x
   x = 37,560,494.03/8,715.89
6. Step 6: Final answer
   x = 4,309.43