Finding the Third Proportional to 3,987,879 and 8,648,814

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987,879 : 8,648,814 = 8,648,814 : x
2. Step 2: Convert to fraction form
   3,987,879/8,648,814 = 8,648,814/x
3. Step 3: Cross multiply
   3,987,879x = 8,648,814 × 8,648,814
4. Step 4: Simplify right side
   3,987,879x = 74,801,983,606,596
5. Step 5: Solve for x
   x = 74,801,983,606,596/3,987,879
6. Step 6: Final answer
   x = 18,757,335.32