Finding the Fourth Proportional to 111.81, 154.33 and 68.17

Step by Step Solution

1. Step 1: Write the proportion equation
   111.81 : 154.33 = 68.17 : x
2. Step 2: Convert to fraction form
   111.81/154.33 = 68.17/x
3. Step 3: Cross multiply
   111.81x = 154.33 × 68.17
4. Step 4: Simplify right side
   111.81x = 10,520.34
5. Step 5: Solve for x
   x = 10,520.34/111.81
6. Step 6: Final answer
   x = 94.09