Finding the Third Proportional to 12,439.50 and 17,399.25

Step by Step Solution

1. Step 1: Write the proportion equation
   12,439.50 : 17,399.25 = 17,399.25 : x
2. Step 2: Convert to fraction form
   12,439.50/17,399.25 = 17,399.25/x
3. Step 3: Cross multiply
   12,439.50x = 17,399.25 × 17,399.25
4. Step 4: Simplify right side
   12,439.50x = 302,733,900.56
5. Step 5: Solve for x
   x = 302,733,900.56/12,439.50
6. Step 6: Final answer
   x = 24,336.50