Finding the Third Proportional to 5,149 and 10,479

Step by Step Solution

1. Step 1: Write the proportion equation
   5,149 : 10,479 = 10,479 : x
2. Step 2: Convert to fraction form
   5,149/10,479 = 10,479/x
3. Step 3: Cross multiply
   5,149x = 10,479 × 10,479
4. Step 4: Simplify right side
   5,149x = 109,809,441
5. Step 5: Solve for x
   x = 109,809,441/5,149
6. Step 6: Final answer
   x = 21,326.36