Finding the Fourth Proportional to 111.20, 153.53 and 67.56

Step by Step Solution

1. Step 1: Write the proportion equation
   111.20 : 153.53 = 67.56 : x
2. Step 2: Convert to fraction form
   111.20/153.53 = 67.56/x
3. Step 3: Cross multiply
   111.20x = 153.53 × 67.56
4. Step 4: Simplify right side
   111.20x = 10,372.49
5. Step 5: Solve for x
   x = 10,372.49/111.20
6. Step 6: Final answer
   x = 93.28