Finding the Third Proportional to 1,086,280 and 1,643,398

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086,280 : 1,643,398 = 1,643,398 : x
2. Step 2: Convert to fraction form
   1,086,280/1,643,398 = 1,643,398/x
3. Step 3: Cross multiply
   1,086,280x = 1,643,398 × 1,643,398
4. Step 4: Simplify right side
   1,086,280x = 2,700,756,986,404
5. Step 5: Solve for x
   x = 2,700,756,986,404/1,086,280
6. Step 6: Final answer
   x = 2,486,243.87