Finding the Fourth Proportional to 17,687.76, 24,412.57 and 10,139.15

Step by Step Solution

1. Step 1: Write the proportion equation
   17,687.76 : 24,412.57 = 10,139.15 : x
2. Step 2: Convert to fraction form
   17,687.76/24,412.57 = 10,139.15/x
3. Step 3: Cross multiply
   17,687.76x = 24,412.57 × 10,139.15
4. Step 4: Simplify right side
   17,687.76x = 247,522,709.12
5. Step 5: Solve for x
   x = 247,522,709.12/17,687.76
6. Step 6: Final answer
   x = 13,994.01