Finding the Fourth Proportional to 22,456.80, 30,990.88 and 12,385.54

Step by Step Solution

1. Step 1: Write the proportion equation
   22,456.80 : 30,990.88 = 12,385.54 : x
2. Step 2: Convert to fraction form
   22,456.80/30,990.88 = 12,385.54/x
3. Step 3: Cross multiply
   22,456.80x = 30,990.88 × 12,385.54
4. Step 4: Simplify right side
   22,456.80x = 383,838,783.88
5. Step 5: Solve for x
   x = 383,838,783.88/22,456.80
6. Step 6: Final answer
   x = 17,092.32