Finding the Third Proportional to 111.48 and 239.94

Step by Step Solution

1. Step 1: Write the proportion equation
   111.48 : 239.94 = 239.94 : x
2. Step 2: Convert to fraction form
   111.48/239.94 = 239.94/x
3. Step 3: Cross multiply
   111.48x = 239.94 × 239.94
4. Step 4: Simplify right side
   111.48x = 57,571.88
5. Step 5: Solve for x
   x = 57,571.88/111.48
6. Step 6: Final answer
   x = 516.43