Finding the Fourth Proportional to 17,686.70, 24,407.82 and 9,728.85

Step by Step Solution

1. Step 1: Write the proportion equation
   17,686.70 : 24,407.82 = 9,728.85 : x
2. Step 2: Convert to fraction form
   17,686.70/24,407.82 = 9,728.85/x
3. Step 3: Cross multiply
   17,686.70x = 24,407.82 × 9,728.85
4. Step 4: Simplify right side
   17,686.70x = 237,460,019.61
5. Step 5: Solve for x
   x = 237,460,019.61/17,686.70
6. Step 6: Final answer
   x = 13,425.91