Finding the Fourth Proportional to 196.79, 271.61 and 123.17

Step by Step Solution

1. Step 1: Write the proportion equation
   196.79 : 271.61 = 123.17 : x
2. Step 2: Convert to fraction form
   196.79/271.61 = 123.17/x
3. Step 3: Cross multiply
   196.79x = 271.61 × 123.17
4. Step 4: Simplify right side
   196.79x = 33,453.59
5. Step 5: Solve for x
   x = 33,453.59/196.79
6. Step 6: Final answer
   x = 170.00