Finding the Third Proportional to 2,542.50 and 5,517

Step by Step Solution

1. Step 1: Write the proportion equation
   2,542.50 : 5,517 = 5,517 : x
2. Step 2: Convert to fraction form
   2,542.50/5,517 = 5,517/x
3. Step 3: Cross multiply
   2,542.50x = 5,517 × 5,517
4. Step 4: Simplify right side
   2,542.50x = 30,437,289
5. Step 5: Solve for x
   x = 30,437,289/2,542.50
6. Step 6: Final answer
   x = 11,971.40