Finding the Third Proportional to 1,215,679 and 2,645,413

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215,679 : 2,645,413 = 2,645,413 : x
2. Step 2: Convert to fraction form
   1,215,679/2,645,413 = 2,645,413/x
3. Step 3: Cross multiply
   1,215,679x = 2,645,413 × 2,645,413
4. Step 4: Simplify right side
   1,215,679x = 6,998,209,940,569
5. Step 5: Solve for x
   x = 6,998,209,940,569/1,215,679
6. Step 6: Final answer
   x = 5,756,626.49