Finding the Third Proportional to 1,018,608 and 2,158,638

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018,608 : 2,158,638 = 2,158,638 : x
2. Step 2: Convert to fraction form
   1,018,608/2,158,638 = 2,158,638/x
3. Step 3: Cross multiply
   1,018,608x = 2,158,638 × 2,158,638
4. Step 4: Simplify right side
   1,018,608x = 4,659,718,015,044
5. Step 5: Solve for x
   x = 4,659,718,015,044/1,018,608
6. Step 6: Final answer
   x = 4,574,593.97