Finding the Third Proportional to 2,499 and 5,358

Step by Step Solution

1. Step 1: Write the proportion equation
   2,499 : 5,358 = 5,358 : x
2. Step 2: Convert to fraction form
   2,499/5,358 = 5,358/x
3. Step 3: Cross multiply
   2,499x = 5,358 × 5,358
4. Step 4: Simplify right side
   2,499x = 28,708,164
5. Step 5: Solve for x
   x = 28,708,164/2,499
6. Step 6: Final answer
   x = 11,487.86