Finding the Fourth Proportional to 22,711.98, 31,337.82 and 13,278.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,711.98 : 31,337.82 = 13,278.72 : x
2. Step 2: Convert to fraction form
   22,711.98/31,337.82 = 13,278.72/x
3. Step 3: Cross multiply
   22,711.98x = 31,337.82 × 13,278.72
4. Step 4: Simplify right side
   22,711.98x = 416,126,137.19
5. Step 5: Solve for x
   x = 416,126,137.19/22,711.98
6. Step 6: Final answer
   x = 18,321.88