Finding the Fourth Proportional to 196.62, 271.53 and 158.10

Step by Step Solution

1. Step 1: Write the proportion equation
   196.62 : 271.53 = 158.10 : x
2. Step 2: Convert to fraction form
   196.62/271.53 = 158.10/x
3. Step 3: Cross multiply
   196.62x = 271.53 × 158.10
4. Step 4: Simplify right side
   196.62x = 42,928.89
5. Step 5: Solve for x
   x = 42,928.89/196.62
6. Step 6: Final answer
   x = 218.33