Finding the Third Proportional to 12,708 and 28,980

Step by Step Solution

1. Step 1: Write the proportion equation
   12,708 : 28,980 = 28,980 : x
2. Step 2: Convert to fraction form
   12,708/28,980 = 28,980/x
3. Step 3: Cross multiply
   12,708x = 28,980 × 28,980
4. Step 4: Simplify right side
   12,708x = 839,840,400
5. Step 5: Solve for x
   x = 839,840,400/12,708
6. Step 6: Final answer
   x = 66,087.54