Finding the Fourth Proportional to 131.27, 196.61 and 109.55

Step by Step Solution

1. Step 1: Write the proportion equation
   131.27 : 196.61 = 109.55 : x
2. Step 2: Convert to fraction form
   131.27/196.61 = 109.55/x
3. Step 3: Cross multiply
   131.27x = 196.61 × 109.55
4. Step 4: Simplify right side
   131.27x = 21,537.09
5. Step 5: Solve for x
   x = 21,537.09/131.27
6. Step 6: Final answer
   x = 164.07