Finding the Third Proportional to 2,561,870 and 5,503,629

Step by Step Solution

1. Step 1: Write the proportion equation
   2,561,870 : 5,503,629 = 5,503,629 : x
2. Step 2: Convert to fraction form
   2,561,870/5,503,629 = 5,503,629/x
3. Step 3: Cross multiply
   2,561,870x = 5,503,629 × 5,503,629
4. Step 4: Simplify right side
   2,561,870x = 30,289,932,169,641
5. Step 5: Solve for x
   x = 30,289,932,169,641/2,561,870
6. Step 6: Final answer
   x = 11,823,368.15