Finding the Fourth Proportional to 111.35, 153.49 and 69.88

Step by Step Solution

1. Step 1: Write the proportion equation
   111.35 : 153.49 = 69.88 : x
2. Step 2: Convert to fraction form
   111.35/153.49 = 69.88/x
3. Step 3: Cross multiply
   111.35x = 153.49 × 69.88
4. Step 4: Simplify right side
   111.35x = 10,725.88
5. Step 5: Solve for x
   x = 10,725.88/111.35
6. Step 6: Final answer
   x = 96.33