Finding the Fourth Proportional to 255.48, 383.31 and 111.30

Step by Step Solution

1. Step 1: Write the proportion equation
   255.48 : 383.31 = 111.30 : x
2. Step 2: Convert to fraction form
   255.48/383.31 = 111.30/x
3. Step 3: Cross multiply
   255.48x = 383.31 × 111.30
4. Step 4: Simplify right side
   255.48x = 42,662.40
5. Step 5: Solve for x
   x = 42,662.40/255.48
6. Step 6: Final answer
   x = 166.99