Finding the Fourth Proportional to 17,687.40, 24,408.35 and 9,729.15

Step by Step Solution

1. Step 1: Write the proportion equation
   17,687.40 : 24,408.35 = 9,729.15 : x
2. Step 2: Convert to fraction form
   17,687.40/24,408.35 = 9,729.15/x
3. Step 3: Cross multiply
   17,687.40x = 24,408.35 × 9,729.15
4. Step 4: Simplify right side
   17,687.40x = 237,472,327.72
5. Step 5: Solve for x
   x = 237,472,327.72/17,687.40
6. Step 6: Final answer
   x = 13,426.08