Finding the Fourth Proportional to 196.72, 271.50 and 109.40

Step by Step Solution

1. Step 1: Write the proportion equation
   196.72 : 271.50 = 109.40 : x
2. Step 2: Convert to fraction form
   196.72/271.50 = 109.40/x
3. Step 3: Cross multiply
   196.72x = 271.50 × 109.40
4. Step 4: Simplify right side
   196.72x = 29,702.10
5. Step 5: Solve for x
   x = 29,702.10/196.72
6. Step 6: Final answer
   x = 150.99