Finding the Fourth Proportional to 111.04, 152.96 and 89.12

Step by Step Solution

1. Step 1: Write the proportion equation
   111.04 : 152.96 = 89.12 : x
2. Step 2: Convert to fraction form
   111.04/152.96 = 89.12/x
3. Step 3: Cross multiply
   111.04x = 152.96 × 89.12
4. Step 4: Simplify right side
   111.04x = 13,631.80
5. Step 5: Solve for x
   x = 13,631.80/111.04
6. Step 6: Final answer
   x = 122.76