Finding the Third Proportional to 8,408,618 and 12,822,891

Step by Step Solution

1. Step 1: Write the proportion equation
   8,408,618 : 12,822,891 = 12,822,891 : x
2. Step 2: Convert to fraction form
   8,408,618/12,822,891 = 12,822,891/x
3. Step 3: Cross multiply
   8,408,618x = 12,822,891 × 12,822,891
4. Step 4: Simplify right side
   8,408,618x = 164,426,533,597,881
5. Step 5: Solve for x
   x = 164,426,533,597,881/8,408,618
6. Step 6: Final answer
   x = 19,554,525.32