Finding the Fourth Proportional to 22,522.71, 31,078.64 and 12,449.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,522.71 : 31,078.64 = 12,449.78 : x
2. Step 2: Convert to fraction form
   22,522.71/31,078.64 = 12,449.78/x
3. Step 3: Cross multiply
   22,522.71x = 31,078.64 × 12,449.78
4. Step 4: Simplify right side
   22,522.71x = 386,922,262.21
5. Step 5: Solve for x
   x = 386,922,262.21/22,522.71
6. Step 6: Final answer
   x = 17,179.20