Finding the Third Proportional to 8,379 and 12,963

Step by Step Solution

1. Step 1: Write the proportion equation
   8,379 : 12,963 = 12,963 : x
2. Step 2: Convert to fraction form
   8,379/12,963 = 12,963/x
3. Step 3: Cross multiply
   8,379x = 12,963 × 12,963
4. Step 4: Simplify right side
   8,379x = 168,039,369
5. Step 5: Solve for x
   x = 168,039,369/8,379
6. Step 6: Final answer
   x = 20,054.82