Finding the Third Proportional to 12,424.50 and 18,510.75

Step by Step Solution

1. Step 1: Write the proportion equation
   12,424.50 : 18,510.75 = 18,510.75 : x
2. Step 2: Convert to fraction form
   12,424.50/18,510.75 = 18,510.75/x
3. Step 3: Cross multiply
   12,424.50x = 18,510.75 × 18,510.75
4. Step 4: Simplify right side
   12,424.50x = 342,647,865.56
5. Step 5: Solve for x
   x = 342,647,865.56/12,424.50
6. Step 6: Final answer
   x = 27,578.40