Finding the Fourth Proportional to 111.54, 153.72 and 108.84

Step by Step Solution

1. Step 1: Write the proportion equation
   111.54 : 153.72 = 108.84 : x
2. Step 2: Convert to fraction form
   111.54/153.72 = 108.84/x
3. Step 3: Cross multiply
   111.54x = 153.72 × 108.84
4. Step 4: Simplify right side
   111.54x = 16,730.88
5. Step 5: Solve for x
   x = 16,730.88/111.54
6. Step 6: Final answer
   x = 150.00