Finding the Fourth Proportional to 111.41, 153.59 and 80.27

Step by Step Solution

1. Step 1: Write the proportion equation
   111.41 : 153.59 = 80.27 : x
2. Step 2: Convert to fraction form
   111.41/153.59 = 80.27/x
3. Step 3: Cross multiply
   111.41x = 153.59 × 80.27
4. Step 4: Simplify right side
   111.41x = 12,328.67
5. Step 5: Solve for x
   x = 12,328.67/111.41
6. Step 6: Final answer
   x = 110.66