Finding the Third Proportional to 3,954,686 and 8,634,268

Step by Step Solution

1. Step 1: Write the proportion equation
   3,954,686 : 8,634,268 = 8,634,268 : x
2. Step 2: Convert to fraction form
   3,954,686/8,634,268 = 8,634,268/x
3. Step 3: Cross multiply
   3,954,686x = 8,634,268 × 8,634,268
4. Step 4: Simplify right side
   3,954,686x = 74,550,583,895,824
5. Step 5: Solve for x
   x = 74,550,583,895,824/3,954,686
6. Step 6: Final answer
   x = 18,851,201.81