Finding the Fourth Proportional to 111.98, 167.25 and 105.74

Step by Step Solution

1. Step 1: Write the proportion equation
   111.98 : 167.25 = 105.74 : x
2. Step 2: Convert to fraction form
   111.98/167.25 = 105.74/x
3. Step 3: Cross multiply
   111.98x = 167.25 × 105.74
4. Step 4: Simplify right side
   111.98x = 17,684.49
5. Step 5: Solve for x
   x = 17,684.49/111.98
6. Step 6: Final answer
   x = 157.93