Finding the Third Proportional to 2,561,866 and 5,503,621

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561,866 : 5,503,621 = 5,503,621 : x
2. Step 2: Convert to fraction form
   2,561,866/5,503,621 = 5,503,621/x
3. Step 3: Cross multiply
   2,561,866x = 5,503,621 × 5,503,621
4. Step 4: Simplify right side
   2,561,866x = 30,289,844,111,641
5. Step 5: Solve for x
   x = 30,289,844,111,641/2,561,866
6. Step 6: Final answer
   x = 11,823,352.24