Finding the Third Proportional to 80,717.50 and 164,720

Step by Step Solution

1. Step 1: Write the proportion equation
   80,717.50 : 164,720 = 164,720 : x
2. Step 2: Convert to fraction form
   80,717.50/164,720 = 164,720/x
3. Step 3: Cross multiply
   80,717.50x = 164,720 × 164,720
4. Step 4: Simplify right side
   80,717.50x = 27,132,678,400
5. Step 5: Solve for x
   x = 27,132,678,400/80,717.50
6. Step 6: Final answer
   x = 336,143.69