Finding the Third Proportional to 647,388 and 1,320,444

Step by Step Solution

1. Step 1: Write the proportion equation
   647,388 : 1,320,444 = 1,320,444 : x
2. Step 2: Convert to fraction form
   647,388/1,320,444 = 1,320,444/x
3. Step 3: Cross multiply
   647,388x = 1,320,444 × 1,320,444
4. Step 4: Simplify right side
   647,388x = 1,743,572,357,136
5. Step 5: Solve for x
   x = 1,743,572,357,136/647,388
6. Step 6: Final answer
   x = 2,693,241.70