Finding the Third Proportional to 3,987,854 and 8,648,764

Step by Step Solution

1. Step 1: Write the proportion equation
   3,987,854 : 8,648,764 = 8,648,764 : x
2. Step 2: Convert to fraction form
   3,987,854/8,648,764 = 8,648,764/x
3. Step 3: Cross multiply
   3,987,854x = 8,648,764 × 8,648,764
4. Step 4: Simplify right side
   3,987,854x = 74,801,118,727,696
5. Step 5: Solve for x
   x = 74,801,118,727,696/3,987,854
6. Step 6: Final answer
   x = 18,757,236.03