Finding the Third Proportional to 640.50 and 1,314

Step by Step Solution

1. Step 1: Write the proportion equation
   640.50 : 1,314 = 1,314 : x
2. Step 2: Convert to fraction form
   640.50/1,314 = 1,314/x
3. Step 3: Cross multiply
   640.50x = 1,314 × 1,314
4. Step 4: Simplify right side
   640.50x = 1,726,596
5. Step 5: Solve for x
   x = 1,726,596/640.50
6. Step 6: Final answer
   x = 2,695.70