Finding the Fourth Proportional to 425,662.64, 638,496.24 and 126,145.82

Step by Step Solution

1. Step 1: Write the proportion equation
   425,662.64 : 638,496.24 = 126,145.82 : x
2. Step 2: Convert to fraction form
   425,662.64/638,496.24 = 126,145.82/x
3. Step 3: Cross multiply
   425,662.64x = 638,496.24 × 126,145.82
4. Step 4: Simplify right side
   425,662.64x = 80,543,631,255.61
5. Step 5: Solve for x
   x = 80,543,631,255.61/425,662.64
6. Step 6: Final answer
   x = 189,219.40