Finding the Fourth Proportional to 80.69, 111.39 and 53.08

Step by Step Solution

1. Step 1: Write the proportion equation
   80.69 : 111.39 = 53.08 : x
2. Step 2: Convert to fraction form
   80.69/111.39 = 53.08/x
3. Step 3: Cross multiply
   80.69x = 111.39 × 53.08
4. Step 4: Simplify right side
   80.69x = 5,912.58
5. Step 5: Solve for x
   x = 5,912.58/80.69
6. Step 6: Final answer
   x = 73.28