Finding the Third Proportional to 8,408,870 and 12,985,961

Step by Step Solution

1. Step 1: Write the proportion equation
   8,408,870 : 12,985,961 = 12,985,961 : x
2. Step 2: Convert to fraction form
   8,408,870/12,985,961 = 12,985,961/x
3. Step 3: Cross multiply
   8,408,870x = 12,985,961 × 12,985,961
4. Step 4: Simplify right side
   8,408,870x = 168,635,183,093,521
5. Step 5: Solve for x
   x = 168,635,183,093,521/8,408,870
6. Step 6: Final answer
   x = 20,054,440.50