Finding the Fourth Proportional to 131.22, 196.83 and 108.18

Step by Step Solution

1. Step 1: Write the proportion equation
   131.22 : 196.83 = 108.18 : x
2. Step 2: Convert to fraction form
   131.22/196.83 = 108.18/x
3. Step 3: Cross multiply
   131.22x = 196.83 × 108.18
4. Step 4: Simplify right side
   131.22x = 21,293.07
5. Step 5: Solve for x
   x = 21,293.07/131.22
6. Step 6: Final answer
   x = 162.27