Finding the Third Proportional to 1,265,778 and 2,578,554

Step by Step Solution

1. Step 1: Write the proportion equation
   1,265,778 : 2,578,554 = 2,578,554 : x
2. Step 2: Convert to fraction form
   1,265,778/2,578,554 = 2,578,554/x
3. Step 3: Cross multiply
   1,265,778x = 2,578,554 × 2,578,554
4. Step 4: Simplify right side
   1,265,778x = 6,648,940,730,916
5. Step 5: Solve for x
   x = 6,648,940,730,916/1,265,778
6. Step 6: Final answer
   x = 5,252,849.02