Finding the Fourth Proportional to 111.84, 154.33 and 70.42

Step by Step Solution

1. Step 1: Write the proportion equation
   111.84 : 154.33 = 70.42 : x
2. Step 2: Convert to fraction form
   111.84/154.33 = 70.42/x
3. Step 3: Cross multiply
   111.84x = 154.33 × 70.42
4. Step 4: Simplify right side
   111.84x = 10,867.15
5. Step 5: Solve for x
   x = 10,867.15/111.84
6. Step 6: Final answer
   x = 97.17