Finding the Fourth Proportional to 80.92, 111.59 and 53.28

Step by Step Solution

1. Step 1: Write the proportion equation
   80.92 : 111.59 = 53.28 : x
2. Step 2: Convert to fraction form
   80.92/111.59 = 53.28/x
3. Step 3: Cross multiply
   80.92x = 111.59 × 53.28
4. Step 4: Simplify right side
   80.92x = 5,945.52
5. Step 5: Solve for x
   x = 5,945.52/80.92
6. Step 6: Final answer
   x = 73.47