Finding the Fourth Proportional to 80.58, 111.24 and 67.42

Step by Step Solution

1. Step 1: Write the proportion equation
   80.58 : 111.24 = 67.42 : x
2. Step 2: Convert to fraction form
   80.58/111.24 = 67.42/x
3. Step 3: Cross multiply
   80.58x = 111.24 × 67.42
4. Step 4: Simplify right side
   80.58x = 7,499.80
5. Step 5: Solve for x
   x = 7,499.80/80.58
6. Step 6: Final answer
   x = 93.07