Finding the Fourth Proportional to 17,685.63, 24,406.17 and 9,728.39

Step by Step Solution

1. Step 1: Write the proportion equation
   17,685.63 : 24,406.17 = 9,728.39 : x
2. Step 2: Convert to fraction form
   17,685.63/24,406.17 = 9,728.39/x
3. Step 3: Cross multiply
   17,685.63x = 24,406.17 × 9,728.39
4. Step 4: Simplify right side
   17,685.63x = 237,432,740.17
5. Step 5: Solve for x
   x = 237,432,740.17/17,685.63
6. Step 6: Final answer
   x = 13,425.18