Finding the Third Proportional to 2,555,406 and 5,642,496

Step by Step Solution

1. Step 1: Write the proportion equation
   2,555,406 : 5,642,496 = 5,642,496 : x
2. Step 2: Convert to fraction form
   2,555,406/5,642,496 = 5,642,496/x
3. Step 3: Cross multiply
   2,555,406x = 5,642,496 × 5,642,496
4. Step 4: Simplify right side
   2,555,406x = 31,837,761,110,016
5. Step 5: Solve for x
   x = 31,837,761,110,016/2,555,406
6. Step 6: Final answer
   x = 12,458,983.47