Finding the Fourth Proportional to 22,781.10, 31,437.83 and 12,709.55

Step by Step Solution

1. Step 1: Write the proportion equation
   22,781.10 : 31,437.83 = 12,709.55 : x
2. Step 2: Convert to fraction form
   22,781.10/31,437.83 = 12,709.55/x
3. Step 3: Cross multiply
   22,781.10x = 31,437.83 × 12,709.55
4. Step 4: Simplify right side
   22,781.10x = 399,560,711.15
5. Step 5: Solve for x
   x = 399,560,711.15/22,781.10
6. Step 6: Final answer
   x = 17,539.13