Finding the Fourth Proportional to 17,687.49, 24,407.78 and 9,728.43

Step by Step Solution

1. Step 1: Write the proportion equation
   17,687.49 : 24,407.78 = 9,728.43 : x
2. Step 2: Convert to fraction form
   17,687.49/24,407.78 = 9,728.43/x
3. Step 3: Cross multiply
   17,687.49x = 24,407.78 × 9,728.43
4. Step 4: Simplify right side
   17,687.49x = 237,449,330.54
5. Step 5: Solve for x
   x = 237,449,330.54/17,687.49
6. Step 6: Final answer
   x = 13,424.70