Finding the Fourth Proportional to 131.36, 196.76 and 105.54

Step by Step Solution

1. Step 1: Write the proportion equation
   131.36 : 196.76 = 105.54 : x
2. Step 2: Convert to fraction form
   131.36/196.76 = 105.54/x
3. Step 3: Cross multiply
   131.36x = 196.76 × 105.54
4. Step 4: Simplify right side
   131.36x = 20,766.31
5. Step 5: Solve for x
   x = 20,766.31/131.36
6. Step 6: Final answer
   x = 158.08