Finding the Fourth Proportional to 151.91, 209.39 and 111.96

Step by Step Solution

1. Step 1: Write the proportion equation
   151.91 : 209.39 = 111.96 : x
2. Step 2: Convert to fraction form
   151.91/209.39 = 111.96/x
3. Step 3: Cross multiply
   151.91x = 209.39 × 111.96
4. Step 4: Simplify right side
   151.91x = 23,443.53
5. Step 5: Solve for x
   x = 23,443.53/151.91
6. Step 6: Final answer
   x = 154.32