Finding the Third Proportional to 39.25 and 72.75

Step by Step Solution

1. Step 1: Write the proportion equation
   39.25 : 72.75 = 72.75 : x
2. Step 2: Convert to fraction form
   39.25/72.75 = 72.75/x
3. Step 3: Cross multiply
   39.25x = 72.75 × 72.75
4. Step 4: Simplify right side
   39.25x = 5,292.56
5. Step 5: Solve for x
   x = 5,292.56/39.25
6. Step 6: Final answer
   x = 134.84