Finding the Fourth Proportional to 196.69, 271.54 and 155.38

Step by Step Solution

1. Step 1: Write the proportion equation
   196.69 : 271.54 = 155.38 : x
2. Step 2: Convert to fraction form
   196.69/271.54 = 155.38/x
3. Step 3: Cross multiply
   196.69x = 271.54 × 155.38
4. Step 4: Simplify right side
   196.69x = 42,191.89
5. Step 5: Solve for x
   x = 42,191.89/196.69
6. Step 6: Final answer
   x = 214.51