Finding the Third Proportional to 134.50 and 231.50

Step by Step Solution

1. Step 1: Write the proportion equation
   134.50 : 231.50 = 231.50 : x
2. Step 2: Convert to fraction form
   134.50/231.50 = 231.50/x
3. Step 3: Cross multiply
   134.50x = 231.50 × 231.50
4. Step 4: Simplify right side
   134.50x = 53,592.25
5. Step 5: Solve for x
   x = 53,592.25/134.50
6. Step 6: Final answer
   x = 398.46