Finding the Fourth Proportional to 196.78, 271.35 and 141.42

Step by Step Solution

1. Step 1: Write the proportion equation
   196.78 : 271.35 = 141.42 : x
2. Step 2: Convert to fraction form
   196.78/271.35 = 141.42/x
3. Step 3: Cross multiply
   196.78x = 271.35 × 141.42
4. Step 4: Simplify right side
   196.78x = 38,374.32
5. Step 5: Solve for x
   x = 38,374.32/196.78
6. Step 6: Final answer
   x = 195.01