Finding the Fourth Proportional to 196.92, 271.59 and 123.10

Step by Step Solution

1. Step 1: Write the proportion equation
   196.92 : 271.59 = 123.10 : x
2. Step 2: Convert to fraction form
   196.92/271.59 = 123.10/x
3. Step 3: Cross multiply
   196.92x = 271.59 × 123.10
4. Step 4: Simplify right side
   196.92x = 33,432.73
5. Step 5: Solve for x
   x = 33,432.73/196.92
6. Step 6: Final answer
   x = 169.78