Finding the Fourth Proportional to 12,706.72, 17,535.20 and 7,329.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,706.72 : 17,535.20 = 7,329.12 : x
2. Step 2: Convert to fraction form
   12,706.72/17,535.20 = 7,329.12/x
3. Step 3: Cross multiply
   12,706.72x = 17,535.20 × 7,329.12
4. Step 4: Simplify right side
   12,706.72x = 128,517,585.02
5. Step 5: Solve for x
   x = 128,517,585.02/12,706.72
6. Step 6: Final answer
   x = 10,114.14