Finding the Fourth Proportional to 111.32, 153.56 and 75.89

Step by Step Solution

1. Step 1: Write the proportion equation
   111.32 : 153.56 = 75.89 : x
2. Step 2: Convert to fraction form
   111.32/153.56 = 75.89/x
3. Step 3: Cross multiply
   111.32x = 153.56 × 75.89
4. Step 4: Simplify right side
   111.32x = 11,652.52
5. Step 5: Solve for x
   x = 11,652.52/111.32
6. Step 6: Final answer
   x = 104.68