Finding the Fourth Proportional to 131.42, 196.59 and 80.06

Step by Step Solution

1. Step 1: Write the proportion equation
   131.42 : 196.59 = 80.06 : x
2. Step 2: Convert to fraction form
   131.42/196.59 = 80.06/x
3. Step 3: Cross multiply
   131.42x = 196.59 × 80.06
4. Step 4: Simplify right side
   131.42x = 15,739.00
5. Step 5: Solve for x
   x = 15,739.00/131.42
6. Step 6: Final answer
   x = 119.76