Finding the Third Proportional to 12,980 and 19,949

Step by Step Solution

1. Step 1: Write the proportion equation
   12,980 : 19,949 = 19,949 : x
2. Step 2: Convert to fraction form
   12,980/19,949 = 19,949/x
3. Step 3: Cross multiply
   12,980x = 19,949 × 19,949
4. Step 4: Simplify right side
   12,980x = 397,962,601
5. Step 5: Solve for x
   x = 397,962,601/12,980
6. Step 6: Final answer
   x = 30,659.68