Finding the Fourth Proportional to 111.73, 167.56 and 42.30

Step by Step Solution

1. Step 1: Write the proportion equation
   111.73 : 167.56 = 42.30 : x
2. Step 2: Convert to fraction form
   111.73/167.56 = 42.30/x
3. Step 3: Cross multiply
   111.73x = 167.56 × 42.30
4. Step 4: Simplify right side
   111.73x = 7,087.79
5. Step 5: Solve for x
   x = 7,087.79/111.73
6. Step 6: Final answer
   x = 63.44