Finding the Fourth Proportional to 196.71, 271.15 and 155.08

Step by Step Solution

1. Step 1: Write the proportion equation
   196.71 : 271.15 = 155.08 : x
2. Step 2: Convert to fraction form
   196.71/271.15 = 155.08/x
3. Step 3: Cross multiply
   196.71x = 271.15 × 155.08
4. Step 4: Simplify right side
   196.71x = 42,049.94
5. Step 5: Solve for x
   x = 42,049.94/196.71
6. Step 6: Final answer
   x = 213.77