Finding the Third Proportional to 8,426,660 and 12,728,548

Step by Step Solution

1. Step 1: Write the proportion equation
   8,426,660 : 12,728,548 = 12,728,548 : x
2. Step 2: Convert to fraction form
   8,426,660/12,728,548 = 12,728,548/x
3. Step 3: Cross multiply
   8,426,660x = 12,728,548 × 12,728,548
4. Step 4: Simplify right side
   8,426,660x = 162,015,934,188,304
5. Step 5: Solve for x
   x = 162,015,934,188,304/8,426,660
6. Step 6: Final answer
   x = 19,226,589.68