Finding the Fourth Proportional to 196.50, 271.34 and 155.27

Step by Step Solution

1. Step 1: Write the proportion equation
   196.50 : 271.34 = 155.27 : x
2. Step 2: Convert to fraction form
   196.50/271.34 = 155.27/x
3. Step 3: Cross multiply
   196.50x = 271.34 × 155.27
4. Step 4: Simplify right side
   196.50x = 42,128.83
5. Step 5: Solve for x
   x = 42,128.83/196.50
6. Step 6: Final answer
   x = 214.40