Finding the Fourth Proportional to 17,685.31, 24,409.20 and 10,136.70

Step by Step Solution

1. Step 1: Write the proportion equation
   17,685.31 : 24,409.20 = 10,136.70 : x
2. Step 2: Convert to fraction form
   17,685.31/24,409.20 = 10,136.70/x
3. Step 3: Cross multiply
   17,685.31x = 24,409.20 × 10,136.70
4. Step 4: Simplify right side
   17,685.31x = 247,428,773.32
5. Step 5: Solve for x
   x = 247,428,773.32/17,685.31
6. Step 6: Final answer
   x = 13,990.64