Finding the Fourth Proportional to 17,681.72, 24,401.40 and 9,724.55

Step by Step Solution

1. Step 1: Write the proportion equation
   17,681.72 : 24,401.40 = 9,724.55 : x
2. Step 2: Convert to fraction form
   17,681.72/24,401.40 = 9,724.55/x
3. Step 3: Cross multiply
   17,681.72x = 24,401.40 × 9,724.55
4. Step 4: Simplify right side
   17,681.72x = 237,292,634.37
5. Step 5: Solve for x
   x = 237,292,634.37/17,681.72
6. Step 6: Final answer
   x = 13,420.22