Finding the Fourth Proportional to 111.08, 153.30 and 67.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111.08 : 153.30 = 67.42 : x
2. Step 2: Convert to fraction form
   111.08/153.30 = 67.42/x
3. Step 3: Cross multiply
   111.08x = 153.30 × 67.42
4. Step 4: Simplify right side
   111.08x = 10,335.49
5. Step 5: Solve for x
   x = 10,335.49/111.08
6. Step 6: Final answer
   x = 93.05