Finding the Third Proportional to 3,987,876 and 8,648,808

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987,876 : 8,648,808 = 8,648,808 : x
2. Step 2: Convert to fraction form
   3,987,876/8,648,808 = 8,648,808/x
3. Step 3: Cross multiply
   3,987,876x = 8,648,808 × 8,648,808
4. Step 4: Simplify right side
   3,987,876x = 74,801,879,820,864
5. Step 5: Solve for x
   x = 74,801,879,820,864/3,987,876
6. Step 6: Final answer
   x = 18,757,323.40