Finding the Fourth Proportional to 100.82, 151.15 and 49.42

Step by Step Solution

1. Step 1: Write the proportion equation
   100.82 : 151.15 = 49.42 : x
2. Step 2: Convert to fraction form
   100.82/151.15 = 49.42/x
3. Step 3: Cross multiply
   100.82x = 151.15 × 49.42
4. Step 4: Simplify right side
   100.82x = 7,469.83
5. Step 5: Solve for x
   x = 7,469.83/100.82
6. Step 6: Final answer
   x = 74.09