Finding the Third Proportional to 2,520 and 5,479

Step by Step Solution

1. Step 1: Write the proportion equation
   2,520 : 5,479 = 5,479 : x
2. Step 2: Convert to fraction form
   2,520/5,479 = 5,479/x
3. Step 3: Cross multiply
   2,520x = 5,479 × 5,479
4. Step 4: Simplify right side
   2,520x = 30,019,441
5. Step 5: Solve for x
   x = 30,019,441/2,520
6. Step 6: Final answer
   x = 11,912.48