Finding the Fourth Proportional to 22,785.10, 31,443.34 and 12,713.56

Step by Step Solution

1. Step 1: Write the proportion equation
   22,785.10 : 31,443.34 = 12,713.56 : x
2. Step 2: Convert to fraction form
   22,785.10/31,443.34 = 12,713.56/x
3. Step 3: Cross multiply
   22,785.10x = 31,443.34 × 12,713.56
4. Step 4: Simplify right side
   22,785.10x = 399,756,789.69
5. Step 5: Solve for x
   x = 399,756,789.69/22,785.10
6. Step 6: Final answer
   x = 17,544.66