Finding the Fourth Proportional to 9,253.97, 12,772.85 and 5,715.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,253.97 : 12,772.85 = 5,715.15 : x
2. Step 2: Convert to fraction form
   9,253.97/12,772.85 = 5,715.15/x
3. Step 3: Cross multiply
   9,253.97x = 12,772.85 × 5,715.15
4. Step 4: Simplify right side
   9,253.97x = 72,998,725.10
5. Step 5: Solve for x
   x = 72,998,725.10/9,253.97
6. Step 6: Final answer
   x = 7,888.37