Finding the Fourth Proportional to 22,930.49, 34,400.90 and 8,139.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,930.49 : 34,400.90 = 8,139.42 : x
2. Step 2: Convert to fraction form
   22,930.49/34,400.90 = 8,139.42/x
3. Step 3: Cross multiply
   22,930.49x = 34,400.90 × 8,139.42
4. Step 4: Simplify right side
   22,930.49x = 280,003,393.83
5. Step 5: Solve for x
   x = 280,003,393.83/22,930.49
6. Step 6: Final answer
   x = 12,210.96