Finding the Fourth Proportional to 111.23, 153.49 and 67.56

Step by Step Solution

1. Step 1: Write the proportion equation
   111.23 : 153.49 = 67.56 : x
2. Step 2: Convert to fraction form
   111.23/153.49 = 67.56/x
3. Step 3: Cross multiply
   111.23x = 153.49 × 67.56
4. Step 4: Simplify right side
   111.23x = 10,369.78
5. Step 5: Solve for x
   x = 10,369.78/111.23
6. Step 6: Final answer
   x = 93.23