Finding the Third Proportional to 1,198,638 and 2,618,163

Step by Step Solution

1. Step 1: Write the proportion equation
   1,198,638 : 2,618,163 = 2,618,163 : x
2. Step 2: Convert to fraction form
   1,198,638/2,618,163 = 2,618,163/x
3. Step 3: Cross multiply
   1,198,638x = 2,618,163 × 2,618,163
4. Step 4: Simplify right side
   1,198,638x = 6,854,777,494,569
5. Step 5: Solve for x
   x = 6,854,777,494,569/1,198,638
6. Step 6: Final answer
   x = 5,718,805.42