Finding the Fourth Proportional to 111.32, 153.60 and 82.32

Step by Step Solution

1. Step 1: Write the proportion equation
   111.32 : 153.60 = 82.32 : x
2. Step 2: Convert to fraction form
   111.32/153.60 = 82.32/x
3. Step 3: Cross multiply
   111.32x = 153.60 × 82.32
4. Step 4: Simplify right side
   111.32x = 12,644.35
5. Step 5: Solve for x
   x = 12,644.35/111.32
6. Step 6: Final answer
   x = 113.59