Finding the Third Proportional to 8,338 and 12,731

Step by Step Solution

1. Step 1: Write the proportion equation
   8,338 : 12,731 = 12,731 : x
2. Step 2: Convert to fraction form
   8,338/12,731 = 12,731/x
3. Step 3: Cross multiply
   8,338x = 12,731 × 12,731
4. Step 4: Simplify right side
   8,338x = 162,078,361
5. Step 5: Solve for x
   x = 162,078,361/8,338
6. Step 6: Final answer
   x = 19,438.52