Finding the Third Proportional to 8,426,656 and 12,728,542

Step by Step Solution

1. Step 1: Write the proportion equation
   8,426,656 : 12,728,542 = 12,728,542 : x
2. Step 2: Convert to fraction form
   8,426,656/12,728,542 = 12,728,542/x
3. Step 3: Cross multiply
   8,426,656x = 12,728,542 × 12,728,542
4. Step 4: Simplify right side
   8,426,656x = 162,015,781,445,764
5. Step 5: Solve for x
   x = 162,015,781,445,764/8,426,656
6. Step 6: Final answer
   x = 19,226,580.68