Finding the Fourth Proportional to 196.95, 271.89 and 155.46

Step by Step Solution

1. Step 1: Write the proportion equation
   196.95 : 271.89 = 155.46 : x
2. Step 2: Convert to fraction form
   196.95/271.89 = 155.46/x
3. Step 3: Cross multiply
   196.95x = 271.89 × 155.46
4. Step 4: Simplify right side
   196.95x = 42,268.02
5. Step 5: Solve for x
   x = 42,268.02/196.95
6. Step 6: Final answer
   x = 214.61