Finding the Third Proportional to 1,987,778 and 2,648,355

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987,778 : 2,648,355 = 2,648,355 : x
2. Step 2: Convert to fraction form
   1,987,778/2,648,355 = 2,648,355/x
3. Step 3: Cross multiply
   1,987,778x = 2,648,355 × 2,648,355
4. Step 4: Simplify right side
   1,987,778x = 7,013,784,206,025
5. Step 5: Solve for x
   x = 7,013,784,206,025/1,987,778
6. Step 6: Final answer
   x = 3,528,454.49