Finding the Third Proportional to 647.50 and 1,359

Step by Step Solution

1. Step 1: Write the proportion equation
   647.50 : 1,359 = 1,359 : x
2. Step 2: Convert to fraction form
   647.50/1,359 = 1,359/x
3. Step 3: Cross multiply
   647.50x = 1,359 × 1,359
4. Step 4: Simplify right side
   647.50x = 1,846,881
5. Step 5: Solve for x
   x = 1,846,881/647.50
6. Step 6: Final answer
   x = 2,852.33