Finding the Fourth Proportional to 196.63, 271.31 and 109.28

Step by Step Solution

1. Step 1: Write the proportion equation
   196.63 : 271.31 = 109.28 : x
2. Step 2: Convert to fraction form
   196.63/271.31 = 109.28/x
3. Step 3: Cross multiply
   196.63x = 271.31 × 109.28
4. Step 4: Simplify right side
   196.63x = 29,648.76
5. Step 5: Solve for x
   x = 29,648.76/196.63
6. Step 6: Final answer
   x = 150.78