Finding the Third Proportional to 5,500 and 12,979

Step by Step Solution

1. Step 1: Write the proportion equation
   5,500 : 12,979 = 12,979 : x
2. Step 2: Convert to fraction form
   5,500/12,979 = 12,979/x
3. Step 3: Cross multiply
   5,500x = 12,979 × 12,979
4. Step 4: Simplify right side
   5,500x = 168,454,441
5. Step 5: Solve for x
   x = 168,454,441/5,500
6. Step 6: Final answer
   x = 30,628.08