Finding the Third Proportional to 2,518 and 5,522.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,518 : 5,522.50 = 5,522.50 : x
2. Step 2: Convert to fraction form
   2,518/5,522.50 = 5,522.50/x
3. Step 3: Cross multiply
   2,518x = 5,522.50 × 5,522.50
4. Step 4: Simplify right side
   2,518x = 30,498,006.25
5. Step 5: Solve for x
   x = 30,498,006.25/2,518
6. Step 6: Final answer
   x = 12,112.00