Finding the Fourth Proportional to 22,521.29, 31,078.15 and 12,449.12

Step by Step Solution

1. Step 1: Write the proportion equation
   22,521.29 : 31,078.15 = 12,449.12 : x
2. Step 2: Convert to fraction form
   22,521.29/31,078.15 = 12,449.12/x
3. Step 3: Cross multiply
   22,521.29x = 31,078.15 × 12,449.12
4. Step 4: Simplify right side
   22,521.29x = 386,895,432.21
5. Step 5: Solve for x
   x = 386,895,432.21/22,521.29
6. Step 6: Final answer
   x = 17,179.10