Finding the Fourth Proportional to 196.78, 271.77 and 134.50

Step by Step Solution

1. Step 1: Write the proportion equation
   196.78 : 271.77 = 134.50 : x
2. Step 2: Convert to fraction form
   196.78/271.77 = 134.50/x
3. Step 3: Cross multiply
   196.78x = 271.77 × 134.50
4. Step 4: Simplify right side
   196.78x = 36,551.03
5. Step 5: Solve for x
   x = 36,551.03/196.78
6. Step 6: Final answer
   x = 185.75