Finding the Fourth Proportional to 17,687.31, 24,411.96 and 10,138.70

Step by Step Solution

1. Step 1: Write the proportion equation
   17,687.31 : 24,411.96 = 10,138.70 : x
2. Step 2: Convert to fraction form
   17,687.31/24,411.96 = 10,138.70/x
3. Step 3: Cross multiply
   17,687.31x = 24,411.96 × 10,138.70
4. Step 4: Simplify right side
   17,687.31x = 247,505,538.85
5. Step 5: Solve for x
   x = 247,505,538.85/17,687.31
6. Step 6: Final answer
   x = 13,993.40