Finding the Fourth Proportional to 51,649.83, 71,281.89 and 31,520.21

Step by Step Solution

1. Step 1: Write the proportion equation
   51,649.83 : 71,281.89 = 31,520.21 : x
2. Step 2: Convert to fraction form
   51,649.83/71,281.89 = 31,520.21/x
3. Step 3: Cross multiply
   51,649.83x = 71,281.89 × 31,520.21
4. Step 4: Simplify right side
   51,649.83x = 2,246,819,785.59
5. Step 5: Solve for x
   x = 2,246,819,785.59/51,649.83
6. Step 6: Final answer
   x = 43,501.01