Finding the Fourth Proportional to 424,738.56, 637,211.52 and 129,250.56

Step by Step Solution

1. Step 1: Write the proportion equation
   424,738.56 : 637,211.52 = 129,250.56 : x
2. Step 2: Convert to fraction form
   424,738.56/637,211.52 = 129,250.56/x
3. Step 3: Cross multiply
   424,738.56x = 637,211.52 × 129,250.56
4. Step 4: Simplify right side
   424,738.56x = 82,359,945,798.45
5. Step 5: Solve for x
   x = 82,359,945,798.45/424,738.56
6. Step 6: Final answer
   x = 193,907.39