Finding the Fourth Proportional to 196.88, 271.61 and 134.72

Step by Step Solution

1. Step 1: Write the proportion equation
   196.88 : 271.61 = 134.72 : x
2. Step 2: Convert to fraction form
   196.88/271.61 = 134.72/x
3. Step 3: Cross multiply
   196.88x = 271.61 × 134.72
4. Step 4: Simplify right side
   196.88x = 36,591.30
5. Step 5: Solve for x
   x = 36,591.30/196.88
6. Step 6: Final answer
   x = 185.86