Finding the Fourth Proportional to 359,644.78, 496,284.33 and 198,465.31

Step by Step Solution

1. Step 1: Write the proportion equation
   359,644.78 : 496,284.33 = 198,465.31 : x
2. Step 2: Convert to fraction form
   359,644.78/496,284.33 = 198,465.31/x
3. Step 3: Cross multiply
   359,644.78x = 496,284.33 × 198,465.31
4. Step 4: Simplify right side
   359,644.78x = 98,495,223,401.59
5. Step 5: Solve for x
   x = 98,495,223,401.59/359,644.78
6. Step 6: Final answer
   x = 273,868.07