Finding the Third Proportional to 12,966 and 20,116

Step by Step Solution

1. Step 1: Write the proportion equation
   12,966 : 20,116 = 20,116 : x
2. Step 2: Convert to fraction form
   12,966/20,116 = 20,116/x
3. Step 3: Cross multiply
   12,966x = 20,116 × 20,116
4. Step 4: Simplify right side
   12,966x = 404,653,456
5. Step 5: Solve for x
   x = 404,653,456/12,966
6. Step 6: Final answer
   x = 31,208.81