Finding the Fourth Proportional to 111.96, 154.50 and 69.97

Step by Step Solution

1. Step 1: Write the proportion equation
   111.96 : 154.50 = 69.97 : x
2. Step 2: Convert to fraction form
   111.96/154.50 = 69.97/x
3. Step 3: Cross multiply
   111.96x = 154.50 × 69.97
4. Step 4: Simplify right side
   111.96x = 10,809.86
5. Step 5: Solve for x
   x = 10,809.86/111.96
6. Step 6: Final answer
   x = 96.55