Finding the Fourth Proportional to 196.88, 271.71 and 112.86

Step by Step Solution

1. Step 1: Write the proportion equation
   196.88 : 271.71 = 112.86 : x
2. Step 2: Convert to fraction form
   196.88/271.71 = 112.86/x
3. Step 3: Cross multiply
   196.88x = 271.71 × 112.86
4. Step 4: Simplify right side
   196.88x = 30,665.19
5. Step 5: Solve for x
   x = 30,665.19/196.88
6. Step 6: Final answer
   x = 155.76