Finding the Fourth Proportional to 12,380.90, 17,082.63 and 7,535.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,380.90 : 17,082.63 = 7,535.61 : x
2. Step 2: Convert to fraction form
   12,380.90/17,082.63 = 7,535.61/x
3. Step 3: Cross multiply
   12,380.90x = 17,082.63 × 7,535.61
4. Step 4: Simplify right side
   12,380.90x = 128,728,037.45
5. Step 5: Solve for x
   x = 128,728,037.45/12,380.90
6. Step 6: Final answer
   x = 10,397.31