Finding the Fourth Proportional to 22,515.57, 31,070.52 and 12,443.49

Step by Step Solution

1. Step 1: Write the proportion equation
   22,515.57 : 31,070.52 = 12,443.49 : x
2. Step 2: Convert to fraction form
   22,515.57/31,070.52 = 12,443.49/x
3. Step 3: Cross multiply
   22,515.57x = 31,070.52 × 12,443.49
4. Step 4: Simplify right side
   22,515.57x = 386,625,704.91
5. Step 5: Solve for x
   x = 386,625,704.91/22,515.57
6. Step 6: Final answer
   x = 17,171.48