Finding the Fourth Proportional to 17,685.48, 24,405.98 and 9,728.31

Step by Step Solution

1. Step 1: Write the proportion equation
   17,685.48 : 24,405.98 = 9,728.31 : x
2. Step 2: Convert to fraction form
   17,685.48/24,405.98 = 9,728.31/x
3. Step 3: Cross multiply
   17,685.48x = 24,405.98 × 9,728.31
4. Step 4: Simplify right side
   17,685.48x = 237,428,890.65
5. Step 5: Solve for x
   x = 237,428,890.65/17,685.48
6. Step 6: Final answer
   x = 13,425.07