Finding the Fourth Proportional to 196.72, 294.90 and 100.42

Step by Step Solution

1. Step 1: Write the proportion equation
   196.72 : 294.90 = 100.42 : x
2. Step 2: Convert to fraction form
   196.72/294.90 = 100.42/x
3. Step 3: Cross multiply
   196.72x = 294.90 × 100.42
4. Step 4: Simplify right side
   196.72x = 29,613.86
5. Step 5: Solve for x
   x = 29,613.86/196.72
6. Step 6: Final answer
   x = 150.54