Finding the Fourth Proportional to 359,355.69, 495,913.86 and 198,216.18

Step by Step Solution

1. Step 1: Write the proportion equation
   359,355.69 : 495,913.86 = 198,216.18 : x
2. Step 2: Convert to fraction form
   359,355.69/495,913.86 = 198,216.18/x
3. Step 3: Cross multiply
   359,355.69x = 495,913.86 × 198,216.18
4. Step 4: Simplify right side
   359,355.69x = 98,298,150,938.25
5. Step 5: Solve for x
   x = 98,298,150,938.25/359,355.69
6. Step 6: Final answer
   x = 273,539.99