Finding the Third Proportional to 80,685.50 and 170,605

Step by Step Solution

1. Step 1: Write the proportion equation
   80,685.50 : 170,605 = 170,605 : x
2. Step 2: Convert to fraction form
   80,685.50/170,605 = 170,605/x
3. Step 3: Cross multiply
   80,685.50x = 170,605 × 170,605
4. Step 4: Simplify right side
   80,685.50x = 29,106,066,025
5. Step 5: Solve for x
   x = 29,106,066,025/80,685.50
6. Step 6: Final answer
   x = 360,734.78