Finding the Fourth Proportional to 75,662.50, 104,417.49 and 42,128.50

Step by Step Solution

1. Step 1: Write the proportion equation
   75,662.50 : 104,417.49 = 42,128.50 : x
2. Step 2: Convert to fraction form
   75,662.50/104,417.49 = 42,128.50/x
3. Step 3: Cross multiply
   75,662.50x = 104,417.49 × 42,128.50
4. Step 4: Simplify right side
   75,662.50x = 4,398,952,227.47
5. Step 5: Solve for x
   x = 4,398,952,227.47/75,662.50
6. Step 6: Final answer
   x = 58,139.13