Finding the Fourth Proportional to 111.48, 166.09 and 105.27

Step by Step Solution

1. Step 1: Write the proportion equation
   111.48 : 166.09 = 105.27 : x
2. Step 2: Convert to fraction form
   111.48/166.09 = 105.27/x
3. Step 3: Cross multiply
   111.48x = 166.09 × 105.27
4. Step 4: Simplify right side
   111.48x = 17,484.29
5. Step 5: Solve for x
   x = 17,484.29/111.48
6. Step 6: Final answer
   x = 156.84