Finding the Fourth Proportional to 131.05, 196.17 and 105.27

Step by Step Solution

1. Step 1: Write the proportion equation
   131.05 : 196.17 = 105.27 : x
2. Step 2: Convert to fraction form
   131.05/196.17 = 105.27/x
3. Step 3: Cross multiply
   131.05x = 196.17 × 105.27
4. Step 4: Simplify right side
   131.05x = 20,650.82
5. Step 5: Solve for x
   x = 20,650.82/131.05
6. Step 6: Final answer
   x = 157.58