Finding the Third Proportional to 5,139 and 10,979

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139 : 10,979 = 10,979 : x
2. Step 2: Convert to fraction form
   5,139/10,979 = 10,979/x
3. Step 3: Cross multiply
   5,139x = 10,979 × 10,979
4. Step 4: Simplify right side
   5,139x = 120,538,441
5. Step 5: Solve for x
   x = 120,538,441/5,139
6. Step 6: Final answer
   x = 23,455.62