Finding the Fourth Proportional to 111.96, 154.51 and 67.69

Step by Step Solution

1. Step 1: Write the proportion equation
   111.96 : 154.51 = 67.69 : x
2. Step 2: Convert to fraction form
   111.96/154.51 = 67.69/x
3. Step 3: Cross multiply
   111.96x = 154.51 × 67.69
4. Step 4: Simplify right side
   111.96x = 10,458.81
5. Step 5: Solve for x
   x = 10,458.81/111.96
6. Step 6: Final answer
   x = 93.42