Finding the Fourth Proportional to 80.82, 111.56 and 48.10

Step by Step Solution

1. Step 1: Write the proportion equation
   80.82 : 111.56 = 48.10 : x
2. Step 2: Convert to fraction form
   80.82/111.56 = 48.10/x
3. Step 3: Cross multiply
   80.82x = 111.56 × 48.10
4. Step 4: Simplify right side
   80.82x = 5,366.04
5. Step 5: Solve for x
   x = 5,366.04/80.82
6. Step 6: Final answer
   x = 66.39