Finding the Third Proportional to 1,291,618 and 2,815,748

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291,618 : 2,815,748 = 2,815,748 : x
2. Step 2: Convert to fraction form
   1,291,618/2,815,748 = 2,815,748/x
3. Step 3: Cross multiply
   1,291,618x = 2,815,748 × 2,815,748
4. Step 4: Simplify right side
   1,291,618x = 7,928,436,799,504
5. Step 5: Solve for x
   x = 7,928,436,799,504/1,291,618
6. Step 6: Final answer
   x = 6,138,375.90