Finding the Third Proportional to 647,510 and 1,320,700

Step by Step Solution

1. Step 1: Write the proportion equation
   647,510 : 1,320,700 = 1,320,700 : x
2. Step 2: Convert to fraction form
   647,510/1,320,700 = 1,320,700/x
3. Step 3: Cross multiply
   647,510x = 1,320,700 × 1,320,700
4. Step 4: Simplify right side
   647,510x = 1,744,248,490,000
5. Step 5: Solve for x
   x = 1,744,248,490,000/647,510
6. Step 6: Final answer
   x = 2,693,778.46