Finding the Third Proportional to 12,896 and 20,104

Step by Step Solution

1. Step 1: Write the proportion equation
   12,896 : 20,104 = 20,104 : x
2. Step 2: Convert to fraction form
   12,896/20,104 = 20,104/x
3. Step 3: Cross multiply
   12,896x = 20,104 × 20,104
4. Step 4: Simplify right side
   12,896x = 404,170,816
5. Step 5: Solve for x
   x = 404,170,816/12,896
6. Step 6: Final answer
   x = 31,340.79