Finding the Third Proportional to 647,427 and 1,320,555

Step by Step Solution

1. Step 1: Write the proportion equation
   647,427 : 1,320,555 = 1,320,555 : x
2. Step 2: Convert to fraction form
   647,427/1,320,555 = 1,320,555/x
3. Step 3: Cross multiply
   647,427x = 1,320,555 × 1,320,555
4. Step 4: Simplify right side
   647,427x = 1,743,865,508,025
5. Step 5: Solve for x
   x = 1,743,865,508,025/647,427
6. Step 6: Final answer
   x = 2,693,532.26