Finding the Fourth Proportional to 17,685.69, 24,406.92 and 9,728.61

Step by Step Solution

1. Step 1: Write the proportion equation
   17,685.69 : 24,406.92 = 9,728.61 : x
2. Step 2: Convert to fraction form
   17,685.69/24,406.92 = 9,728.61/x
3. Step 3: Cross multiply
   17,685.69x = 24,406.92 × 9,728.61
4. Step 4: Simplify right side
   17,685.69x = 237,445,405.98
5. Step 5: Solve for x
   x = 237,445,405.98/17,685.69
6. Step 6: Final answer
   x = 13,425.85