Finding the Fourth Proportional to 111.08, 167.58 and 105.38

Step by Step Solution

1. Step 1: Write the proportion equation
   111.08 : 167.58 = 105.38 : x
2. Step 2: Convert to fraction form
   111.08/167.58 = 105.38/x
3. Step 3: Cross multiply
   111.08x = 167.58 × 105.38
4. Step 4: Simplify right side
   111.08x = 17,659.58
5. Step 5: Solve for x
   x = 17,659.58/111.08
6. Step 6: Final answer
   x = 158.98