Finding the Third Proportional to 3,954,678 and 8,634,252

Step by Step Solution

1. Step 1: Write the proportion equation
   3,954,678 : 8,634,252 = 8,634,252 : x
2. Step 2: Convert to fraction form
   3,954,678/8,634,252 = 8,634,252/x
3. Step 3: Cross multiply
   3,954,678x = 8,634,252 × 8,634,252
4. Step 4: Simplify right side
   3,954,678x = 74,550,307,599,504
5. Step 5: Solve for x
   x = 74,550,307,599,504/3,954,678
6. Step 6: Final answer
   x = 18,851,170.08