Finding the Fourth Proportional to 17,871.99, 24,666.30 and 9,916.78

Step by Step Solution

1. Step 1: Write the proportion equation
   17,871.99 : 24,666.30 = 9,916.78 : x
2. Step 2: Convert to fraction form
   17,871.99/24,666.30 = 9,916.78/x
3. Step 3: Cross multiply
   17,871.99x = 24,666.30 × 9,916.78
4. Step 4: Simplify right side
   17,871.99x = 244,610,255.27
5. Step 5: Solve for x
   x = 244,610,255.27/17,871.99
6. Step 6: Final answer
   x = 13,686.79