Finding the Fourth Proportional to 111.58, 153.69 and 105.23

Step by Step Solution

1. Step 1: Write the proportion equation
   111.58 : 153.69 = 105.23 : x
2. Step 2: Convert to fraction form
   111.58/153.69 = 105.23/x
3. Step 3: Cross multiply
   111.58x = 153.69 × 105.23
4. Step 4: Simplify right side
   111.58x = 16,172.80
5. Step 5: Solve for x
   x = 16,172.80/111.58
6. Step 6: Final answer
   x = 144.94