Finding the Fourth Proportional to 111.38, 153.73 and 76.38

Step by Step Solution

1. Step 1: Write the proportion equation
   111.38 : 153.73 = 76.38 : x
2. Step 2: Convert to fraction form
   111.38/153.73 = 76.38/x
3. Step 3: Cross multiply
   111.38x = 153.73 × 76.38
4. Step 4: Simplify right side
   111.38x = 11,741.42
5. Step 5: Solve for x
   x = 11,741.42/111.38
6. Step 6: Final answer
   x = 105.42