Finding the Fourth Proportional to 155.24, 213.89 and 111.50

Step by Step Solution

1. Step 1: Write the proportion equation
   155.24 : 213.89 = 111.50 : x
2. Step 2: Convert to fraction form
   155.24/213.89 = 111.50/x
3. Step 3: Cross multiply
   155.24x = 213.89 × 111.50
4. Step 4: Simplify right side
   155.24x = 23,847.67
5. Step 5: Solve for x
   x = 23,847.67/155.24
6. Step 6: Final answer
   x = 153.62