Finding the Third Proportional to 3,940,900 and 8,510,504

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940,900 : 8,510,504 = 8,510,504 : x
2. Step 2: Convert to fraction form
   3,940,900/8,510,504 = 8,510,504/x
3. Step 3: Cross multiply
   3,940,900x = 8,510,504 × 8,510,504
4. Step 4: Simplify right side
   3,940,900x = 72,428,678,334,016
5. Step 5: Solve for x
   x = 72,428,678,334,016/3,940,900
6. Step 6: Final answer
   x = 18,378,715.10