Finding the Third Proportional to 564,813 and 1,221,398

Step by Step Solution

1. Step 1: Write the proportion equation
   564,813 : 1,221,398 = 1,221,398 : x
2. Step 2: Convert to fraction form
   564,813/1,221,398 = 1,221,398/x
3. Step 3: Cross multiply
   564,813x = 1,221,398 × 1,221,398
4. Step 4: Simplify right side
   564,813x = 1,491,813,074,404
5. Step 5: Solve for x
   x = 1,491,813,074,404/564,813
6. Step 6: Final answer
   x = 2,641,251.31