Finding the Fourth Proportional to 17,686.72, 24,408.32 and 9,729.55

Step by Step Solution

1. Step 1: Write the proportion equation
   17,686.72 : 24,408.32 = 9,729.55 : x
2. Step 2: Convert to fraction form
   17,686.72/24,408.32 = 9,729.55/x
3. Step 3: Cross multiply
   17,686.72x = 24,408.32 × 9,729.55
4. Step 4: Simplify right side
   17,686.72x = 237,481,969.86
5. Step 5: Solve for x
   x = 237,481,969.86/17,686.72
6. Step 6: Final answer
   x = 13,427.13