Finding the Fourth Proportional to 111.67, 154.10 and 67.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111.67 : 154.10 = 67.42 : x
2. Step 2: Convert to fraction form
   111.67/154.10 = 67.42/x
3. Step 3: Cross multiply
   111.67x = 154.10 × 67.42
4. Step 4: Simplify right side
   111.67x = 10,389.47
5. Step 5: Solve for x
   x = 10,389.47/111.67
6. Step 6: Final answer
   x = 93.04