Finding the Third Proportional to 134.91 and 240.56

Step by Step Solution

1. Step 1: Write the proportion equation
   134.91 : 240.56 = 240.56 : x
2. Step 2: Convert to fraction form
   134.91/240.56 = 240.56/x
3. Step 3: Cross multiply
   134.91x = 240.56 × 240.56
4. Step 4: Simplify right side
   134.91x = 57,870.32
5. Step 5: Solve for x
   x = 57,870.32/134.91
6. Step 6: Final answer
   x = 428.97