Finding the Fourth Proportional to 131.86, 196.55 and 131.05

Step by Step Solution

1. Step 1: Write the proportion equation
   131.86 : 196.55 = 131.05 : x
2. Step 2: Convert to fraction form
   131.86/196.55 = 131.05/x
3. Step 3: Cross multiply
   131.86x = 196.55 × 131.05
4. Step 4: Simplify right side
   131.86x = 25,757.88
5. Step 5: Solve for x
   x = 25,757.88/131.86
6. Step 6: Final answer
   x = 195.34