Finding the Fourth Proportional to 131.33, 196.74 and 80.00

Step by Step Solution

1. Step 1: Write the proportion equation
   131.33 : 196.74 = 80.00 : x
2. Step 2: Convert to fraction form
   131.33/196.74 = 80.00/x
3. Step 3: Cross multiply
   131.33x = 196.74 × 80.00
4. Step 4: Simplify right side
   131.33x = 15,737.82
5. Step 5: Solve for x
   x = 15,737.82/131.33
6. Step 6: Final answer
   x = 119.84