Finding the Third Proportional to 1,288,672 and 2,789,728

Step by Step Solution

1. Step 1: Write the proportion equation
   1,288,672 : 2,789,728 = 2,789,728 : x
2. Step 2: Convert to fraction form
   1,288,672/2,789,728 = 2,789,728/x
3. Step 3: Cross multiply
   1,288,672x = 2,789,728 × 2,789,728
4. Step 4: Simplify right side
   1,288,672x = 7,782,582,313,984
5. Step 5: Solve for x
   x = 7,782,582,313,984/1,288,672
6. Step 6: Final answer
   x = 6,039,226.67