Finding the Third Proportional to 8,451,046 and 12,678,398

Step by Step Solution

1. Step 1: Write the proportion equation
   8,451,046 : 12,678,398 = 12,678,398 : x
2. Step 2: Convert to fraction form
   8,451,046/12,678,398 = 12,678,398/x
3. Step 3: Cross multiply
   8,451,046x = 12,678,398 × 12,678,398
4. Step 4: Simplify right side
   8,451,046x = 160,741,775,846,404
5. Step 5: Solve for x
   x = 160,741,775,846,404/8,451,046
6. Step 6: Final answer
   x = 19,020,340.90