Finding the Third Proportional to 339.50 and 439.25

Step by Step Solution

1. Step 1: Write the proportion equation
   339.50 : 439.25 = 439.25 : x
2. Step 2: Convert to fraction form
   339.50/439.25 = 439.25/x
3. Step 3: Cross multiply
   339.50x = 439.25 × 439.25
4. Step 4: Simplify right side
   339.50x = 192,940.56
5. Step 5: Solve for x
   x = 192,940.56/339.50
6. Step 6: Final answer
   x = 568.31