Finding the Third Proportional to 1,018,618 and 2,158,658

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018,618 : 2,158,658 = 2,158,658 : x
2. Step 2: Convert to fraction form
   1,018,618/2,158,658 = 2,158,658/x
3. Step 3: Cross multiply
   1,018,618x = 2,158,658 × 2,158,658
4. Step 4: Simplify right side
   1,018,618x = 4,659,804,360,964
5. Step 5: Solve for x
   x = 4,659,804,360,964/1,018,618
6. Step 6: Final answer
   x = 4,574,633.83