Finding the Third Proportional to 647,505 and 1,320,705

Step by Step Solution

1. Step 1: Write the proportion equation
   647,505 : 1,320,705 = 1,320,705 : x
2. Step 2: Convert to fraction form
   647,505/1,320,705 = 1,320,705/x
3. Step 3: Cross multiply
   647,505x = 1,320,705 × 1,320,705
4. Step 4: Simplify right side
   647,505x = 1,744,261,697,025
5. Step 5: Solve for x
   x = 1,744,261,697,025/647,505
6. Step 6: Final answer
   x = 2,693,819.66