Finding the Third Proportional to 12,728 and 20,010

Step by Step Solution

1. Step 1: Write the proportion equation
   12,728 : 20,010 = 20,010 : x
2. Step 2: Convert to fraction form
   12,728/20,010 = 20,010/x
3. Step 3: Cross multiply
   12,728x = 20,010 × 20,010
4. Step 4: Simplify right side
   12,728x = 400,400,100
5. Step 5: Solve for x
   x = 400,400,100/12,728
6. Step 6: Final answer
   x = 31,458.21