Finding the Fourth Proportional to 22,456.80, 30,988.95 and 12,385.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,456.80 : 30,988.95 = 12,385.31 : x
2. Step 2: Convert to fraction form
   22,456.80/30,988.95 = 12,385.31/x
3. Step 3: Cross multiply
   22,456.80x = 30,988.95 × 12,385.31
4. Step 4: Simplify right side
   22,456.80x = 383,807,597.38
5. Step 5: Solve for x
   x = 383,807,597.38/22,456.80
6. Step 6: Final answer
   x = 17,090.93