Finding the Fourth Proportional to 22,456.50, 30,989.56 and 12,385.87

Step by Step Solution

1. Step 1: Write the proportion equation
   22,456.50 : 30,989.56 = 12,385.87 : x
2. Step 2: Convert to fraction form
   22,456.50/30,989.56 = 12,385.87/x
3. Step 3: Cross multiply
   22,456.50x = 30,989.56 × 12,385.87
4. Step 4: Simplify right side
   22,456.50x = 383,832,708.03
5. Step 5: Solve for x
   x = 383,832,708.03/22,456.50
6. Step 6: Final answer
   x = 17,092.28