Finding the Fourth Proportional to 16,658.88, 22,989.29 and 9,105.30

Step by Step Solution

1. Step 1: Write the proportion equation
   16,658.88 : 22,989.29 = 9,105.30 : x
2. Step 2: Convert to fraction form
   16,658.88/22,989.29 = 9,105.30/x
3. Step 3: Cross multiply
   16,658.88x = 22,989.29 × 9,105.30
4. Step 4: Simplify right side
   16,658.88x = 209,324,336.71
5. Step 5: Solve for x
   x = 209,324,336.71/16,658.88
6. Step 6: Final answer
   x = 12,565.33