Finding the Fourth Proportional to 196.61, 271.34 and 109.31

Step by Step Solution

1. Step 1: Write the proportion equation
   196.61 : 271.34 = 109.31 : x
2. Step 2: Convert to fraction form
   196.61/271.34 = 109.31/x
3. Step 3: Cross multiply
   196.61x = 271.34 × 109.31
4. Step 4: Simplify right side
   196.61x = 29,658.27
5. Step 5: Solve for x
   x = 29,658.27/196.61
6. Step 6: Final answer
   x = 150.85