Finding the Fourth Proportional to 111.69, 167.49 and 42.27

Step by Step Solution

1. Step 1: Write the proportion equation
   111.69 : 167.49 = 42.27 : x
2. Step 2: Convert to fraction form
   111.69/167.49 = 42.27/x
3. Step 3: Cross multiply
   111.69x = 167.49 × 42.27
4. Step 4: Simplify right side
   111.69x = 7,079.80
5. Step 5: Solve for x
   x = 7,079.80/111.69
6. Step 6: Final answer
   x = 63.39