Finding the Fourth Proportional to 111.56, 167.53 and 105.79

Step by Step Solution

1. Step 1: Write the proportion equation
   111.56 : 167.53 = 105.79 : x
2. Step 2: Convert to fraction form
   111.56/167.53 = 105.79/x
3. Step 3: Cross multiply
   111.56x = 167.53 × 105.79
4. Step 4: Simplify right side
   111.56x = 17,722.16
5. Step 5: Solve for x
   x = 17,722.16/111.56
6. Step 6: Final answer
   x = 158.86