Finding the Fourth Proportional to 17,872.77, 24,665.59 and 9,915.87

Step by Step Solution

1. Step 1: Write the proportion equation
   17,872.77 : 24,665.59 = 9,915.87 : x
2. Step 2: Convert to fraction form
   17,872.77/24,665.59 = 9,915.87/x
3. Step 3: Cross multiply
   17,872.77x = 24,665.59 × 9,915.87
4. Step 4: Simplify right side
   17,872.77x = 244,580,783.91
5. Step 5: Solve for x
   x = 244,580,783.91/17,872.77
6. Step 6: Final answer
   x = 13,684.55