Finding the Third Proportional to 647,328 and 1,320,360

Step by Step Solution

1. Step 1: Write the proportion equation
   647,328 : 1,320,360 = 1,320,360 : x
2. Step 2: Convert to fraction form
   647,328/1,320,360 = 1,320,360/x
3. Step 3: Cross multiply
   647,328x = 1,320,360 × 1,320,360
4. Step 4: Simplify right side
   647,328x = 1,743,350,529,600
5. Step 5: Solve for x
   x = 1,743,350,529,600/647,328
6. Step 6: Final answer
   x = 2,693,148.65