Finding the Third Proportional to 99,391.50 and 198,702

Step by Step Solution

1. Step 1: Write the proportion equation
   99,391.50 : 198,702 = 198,702 : x
2. Step 2: Convert to fraction form
   99,391.50/198,702 = 198,702/x
3. Step 3: Cross multiply
   99,391.50x = 198,702 × 198,702
4. Step 4: Simplify right side
   99,391.50x = 39,482,484,804
5. Step 5: Solve for x
   x = 39,482,484,804/99,391.50
6. Step 6: Final answer
   x = 397,242.07