Finding the Fourth Proportional to 359,761.89, 496,472.04 and 198,617.21

Step by Step Solution

1. Step 1: Write the proportion equation
   359,761.89 : 496,472.04 = 198,617.21 : x
2. Step 2: Convert to fraction form
   359,761.89/496,472.04 = 198,617.21/x
3. Step 3: Cross multiply
   359,761.89x = 496,472.04 × 198,617.21
4. Step 4: Simplify right side
   359,761.89x = 98,607,888,945.45
5. Step 5: Solve for x
   x = 98,607,888,945.45/359,761.89
6. Step 6: Final answer
   x = 274,092.09