Finding the Fourth Proportional to 110.67, 166.02 and 42.18

Step by Step Solution

1. Step 1: Write the proportion equation
   110.67 : 166.02 = 42.18 : x
2. Step 2: Convert to fraction form
   110.67/166.02 = 42.18/x
3. Step 3: Cross multiply
   110.67x = 166.02 × 42.18
4. Step 4: Simplify right side
   110.67x = 7,002.72
5. Step 5: Solve for x
   x = 7,002.72/110.67
6. Step 6: Final answer
   x = 63.28