Finding the Fourth Proportional to 425,139.60, 637,799.37 and 140,814.05

Step by Step Solution

1. Step 1: Write the proportion equation
   425,139.60 : 637,799.37 = 140,814.05 : x
2. Step 2: Convert to fraction form
   425,139.60/637,799.37 = 140,814.05/x
3. Step 3: Cross multiply
   425,139.60x = 637,799.37 × 140,814.05
4. Step 4: Simplify right side
   425,139.60x = 89,811,109,188.15
5. Step 5: Solve for x
   x = 89,811,109,188.15/425,139.60
6. Step 6: Final answer
   x = 211,250.87