Finding the Third Proportional to 2,561,820 and 5,519,514

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561,820 : 5,519,514 = 5,519,514 : x
2. Step 2: Convert to fraction form
   2,561,820/5,519,514 = 5,519,514/x
3. Step 3: Cross multiply
   2,561,820x = 5,519,514 × 5,519,514
4. Step 4: Simplify right side
   2,561,820x = 30,465,034,796,196
5. Step 5: Solve for x
   x = 30,465,034,796,196/2,561,820
6. Step 6: Final answer
   x = 11,891,949.78