Finding the Fourth Proportional to 80.97, 111.71 and 53.37

Step by Step Solution

1. Step 1: Write the proportion equation
   80.97 : 111.71 = 53.37 : x
2. Step 2: Convert to fraction form
   80.97/111.71 = 53.37/x
3. Step 3: Cross multiply
   80.97x = 111.71 × 53.37
4. Step 4: Simplify right side
   80.97x = 5,961.96
5. Step 5: Solve for x
   x = 5,961.96/80.97
6. Step 6: Final answer
   x = 73.63