Finding the Third Proportional to 198,640.50 and 434,418

Step by Step Solution

1. Step 1: Write the proportion equation
   198,640.50 : 434,418 = 434,418 : x
2. Step 2: Convert to fraction form
   198,640.50/434,418 = 434,418/x
3. Step 3: Cross multiply
   198,640.50x = 434,418 × 434,418
4. Step 4: Simplify right side
   198,640.50x = 188,718,998,724
5. Step 5: Solve for x
   x = 188,718,998,724/198,640.50
6. Step 6: Final answer
   x = 950,052.98