Finding the Fourth Proportional to 17,643.72, 24,348.96 and 9,686.55

Step by Step Solution

1. Step 1: Write the proportion equation
   17,643.72 : 24,348.96 = 9,686.55 : x
2. Step 2: Convert to fraction form
   17,643.72/24,348.96 = 9,686.55/x
3. Step 3: Cross multiply
   17,643.72x = 24,348.96 × 9,686.55
4. Step 4: Simplify right side
   17,643.72x = 235,857,418.49
5. Step 5: Solve for x
   x = 235,857,418.49/17,643.72
6. Step 6: Final answer
   x = 13,367.78