Finding the Fourth Proportional to 22,456.30, 30,989.92 and 12,385.15

Step by Step Solution

1. Step 1: Write the proportion equation
   22,456.30 : 30,989.92 = 12,385.15 : x
2. Step 2: Convert to fraction form
   22,456.30/30,989.92 = 12,385.15/x
3. Step 3: Cross multiply
   22,456.30x = 30,989.92 × 12,385.15
4. Step 4: Simplify right side
   22,456.30x = 383,814,807.69
5. Step 5: Solve for x
   x = 383,814,807.69/22,456.30
6. Step 6: Final answer
   x = 17,091.63