Finding the Fourth Proportional to 144.78, 199.98 and 111.96

Step by Step Solution

1. Step 1: Write the proportion equation
   144.78 : 199.98 = 111.96 : x
2. Step 2: Convert to fraction form
   144.78/199.98 = 111.96/x
3. Step 3: Cross multiply
   144.78x = 199.98 × 111.96
4. Step 4: Simplify right side
   144.78x = 22,389.76
5. Step 5: Solve for x
   x = 22,389.76/144.78
6. Step 6: Final answer
   x = 154.65