Finding the Fourth Proportional to 22,521.13, 31,079.87 and 12,449.89

Step by Step Solution

1. Step 1: Write the proportion equation
   22,521.13 : 31,079.87 = 12,449.89 : x
2. Step 2: Convert to fraction form
   22,521.13/31,079.87 = 12,449.89/x
3. Step 3: Cross multiply
   22,521.13x = 31,079.87 × 12,449.89
4. Step 4: Simplify right side
   22,521.13x = 386,940,962.71
5. Step 5: Solve for x
   x = 386,940,962.71/22,521.13
6. Step 6: Final answer
   x = 17,181.24