Finding the Third Proportional to 1,256,836 and 2,690,812

Step by Step Solution

1. Step 1: Write the proportion equation
   1,256,836 : 2,690,812 = 2,690,812 : x
2. Step 2: Convert to fraction form
   1,256,836/2,690,812 = 2,690,812/x
3. Step 3: Cross multiply
   1,256,836x = 2,690,812 × 2,690,812
4. Step 4: Simplify right side
   1,256,836x = 7,240,469,219,344
5. Step 5: Solve for x
   x = 7,240,469,219,344/1,256,836
6. Step 6: Final answer
   x = 5,760,870.33