Finding the Third Proportional to 3,863,715 and 8,391,144

Step by Step Solution

1. Step 1: Write the proportion equation
   3,863,715 : 8,391,144 = 8,391,144 : x
2. Step 2: Convert to fraction form
   3,863,715/8,391,144 = 8,391,144/x
3. Step 3: Cross multiply
   3,863,715x = 8,391,144 × 8,391,144
4. Step 4: Simplify right side
   3,863,715x = 70,411,297,628,736
5. Step 5: Solve for x
   x = 70,411,297,628,736/3,863,715
6. Step 6: Final answer
   x = 18,223,729.66