Finding the Fourth Proportional to 17,687.72, 24,402.78 and 10,966.40

Step by Step Solution

1. Step 1: Write the proportion equation
   17,687.72 : 24,402.78 = 10,966.40 : x
2. Step 2: Convert to fraction form
   17,687.72/24,402.78 = 10,966.40/x
3. Step 3: Cross multiply
   17,687.72x = 24,402.78 × 10,966.40
4. Step 4: Simplify right side
   17,687.72x = 267,610,646.59
5. Step 5: Solve for x
   x = 267,610,646.59/17,687.72
6. Step 6: Final answer
   x = 15,129.74