Finding the Fourth Proportional to 80.82, 111.55 and 67.69

Step by Step Solution

1. Step 1: Write the proportion equation
   80.82 : 111.55 = 67.69 : x
2. Step 2: Convert to fraction form
   80.82/111.55 = 67.69/x
3. Step 3: Cross multiply
   80.82x = 111.55 × 67.69
4. Step 4: Simplify right side
   80.82x = 7,549.92
5. Step 5: Solve for x
   x = 7,549.92/80.82
6. Step 6: Final answer
   x = 93.42