Finding the Third Proportional to 2,578,507 and 5,368,919

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578,507 : 5,368,919 = 5,368,919 : x
2. Step 2: Convert to fraction form
   2,578,507/5,368,919 = 5,368,919/x
3. Step 3: Cross multiply
   2,578,507x = 5,368,919 × 5,368,919
4. Step 4: Simplify right side
   2,578,507x = 28,825,291,228,561
5. Step 5: Solve for x
   x = 28,825,291,228,561/2,578,507
6. Step 6: Final answer
   x = 11,179,062.62