Finding the Fourth Proportional to 111.42, 166.88 and 59.97

Step by Step Solution

1. Step 1: Write the proportion equation
   111.42 : 166.88 = 59.97 : x
2. Step 2: Convert to fraction form
   111.42/166.88 = 59.97/x
3. Step 3: Cross multiply
   111.42x = 166.88 × 59.97
4. Step 4: Simplify right side
   111.42x = 10,007.49
5. Step 5: Solve for x
   x = 10,007.49/111.42
6. Step 6: Final answer
   x = 89.82