Finding the Third Proportional to 3,789,918 and 8,218,314

Step by Step Solution

1. Step 1: Write the proportion equation
   3,789,918 : 8,218,314 = 8,218,314 : x
2. Step 2: Convert to fraction form
   3,789,918/8,218,314 = 8,218,314/x
3. Step 3: Cross multiply
   3,789,918x = 8,218,314 × 8,218,314
4. Step 4: Simplify right side
   3,789,918x = 67,540,685,002,596
5. Step 5: Solve for x
   x = 67,540,685,002,596/3,789,918
6. Step 6: Final answer
   x = 17,821,146.79