Finding the Fourth Proportional to 111.15, 153.23 and 83.52

Step by Step Solution

1. Step 1: Write the proportion equation
   111.15 : 153.23 = 83.52 : x
2. Step 2: Convert to fraction form
   111.15/153.23 = 83.52/x
3. Step 3: Cross multiply
   111.15x = 153.23 × 83.52
4. Step 4: Simplify right side
   111.15x = 12,797.35
5. Step 5: Solve for x
   x = 12,797.35/111.15
6. Step 6: Final answer
   x = 115.14