Finding the Third Proportional to 12,976 and 20,040

Step by Step Solution

1. Step 1: Write the proportion equation
   12,976 : 20,040 = 20,040 : x
2. Step 2: Convert to fraction form
   12,976/20,040 = 20,040/x
3. Step 3: Cross multiply
   12,976x = 20,040 × 20,040
4. Step 4: Simplify right side
   12,976x = 401,601,600
5. Step 5: Solve for x
   x = 401,601,600/12,976
6. Step 6: Final answer
   x = 30,949.57