Finding the Third Proportional to 90,320 and 198,616

Step by Step Solution

1. Step 1: Write the proportion equation
   90,320 : 198,616 = 198,616 : x
2. Step 2: Convert to fraction form
   90,320/198,616 = 198,616/x
3. Step 3: Cross multiply
   90,320x = 198,616 × 198,616
4. Step 4: Simplify right side
   90,320x = 39,448,315,456
5. Step 5: Solve for x
   x = 39,448,315,456/90,320
6. Step 6: Final answer
   x = 436,761.69