Finding the Fourth Proportional to 111.73, 154.16 and 85.52

Step by Step Solution

1. Step 1: Write the proportion equation
   111.73 : 154.16 = 85.52 : x
2. Step 2: Convert to fraction form
   111.73/154.16 = 85.52/x
3. Step 3: Cross multiply
   111.73x = 154.16 × 85.52
4. Step 4: Simplify right side
   111.73x = 13,183.72
5. Step 5: Solve for x
   x = 13,183.72/111.73
6. Step 6: Final answer
   x = 118.00