Finding the Third Proportional to 8,315,256 and 12,438,976

Step by Step Solution

1. Step 1: Write the proportion equation
   8,315,256 : 12,438,976 = 12,438,976 : x
2. Step 2: Convert to fraction form
   8,315,256/12,438,976 = 12,438,976/x
3. Step 3: Cross multiply
   8,315,256x = 12,438,976 × 12,438,976
4. Step 4: Simplify right side
   8,315,256x = 154,728,123,928,576
5. Step 5: Solve for x
   x = 154,728,123,928,576/8,315,256
6. Step 6: Final answer
   x = 18,607,740.27