Finding the Fourth Proportional to 131.22, 196.65 and 111.96

Step by Step Solution

1. Step 1: Write the proportion equation
   131.22 : 196.65 = 111.96 : x
2. Step 2: Convert to fraction form
   131.22/196.65 = 111.96/x
3. Step 3: Cross multiply
   131.22x = 196.65 × 111.96
4. Step 4: Simplify right side
   131.22x = 22,016.93
5. Step 5: Solve for x
   x = 22,016.93/131.22
6. Step 6: Final answer
   x = 167.79