Finding the Fourth Proportional to 111.72, 167.76 and 96.60

Step by Step Solution

1. Step 1: Write the proportion equation
   111.72 : 167.76 = 96.60 : x
2. Step 2: Convert to fraction form
   111.72/167.76 = 96.60/x
3. Step 3: Cross multiply
   111.72x = 167.76 × 96.60
4. Step 4: Simplify right side
   111.72x = 16,205.62
5. Step 5: Solve for x
   x = 16,205.62/111.72
6. Step 6: Final answer
   x = 145.06