Finding the Third Proportional to 8,426 and 12,755

Step by Step Solution

1. Step 1: Write the proportion equation
   8,426 : 12,755 = 12,755 : x
2. Step 2: Convert to fraction form
   8,426/12,755 = 12,755/x
3. Step 3: Cross multiply
   8,426x = 12,755 × 12,755
4. Step 4: Simplify right side
   8,426x = 162,690,025
5. Step 5: Solve for x
   x = 162,690,025/8,426
6. Step 6: Final answer
   x = 19,308.10