Finding the Fourth Proportional to 111.98, 154.49 and 69.96

Step by Step Solution

1. Step 1: Write the proportion equation
   111.98 : 154.49 = 69.96 : x
2. Step 2: Convert to fraction form
   111.98/154.49 = 69.96/x
3. Step 3: Cross multiply
   111.98x = 154.49 × 69.96
4. Step 4: Simplify right side
   111.98x = 10,807.77
5. Step 5: Solve for x
   x = 10,807.77/111.98
6. Step 6: Final answer
   x = 96.52