Finding the Fourth Proportional to 111.32, 153.60 and 69.88

Step by Step Solution

1. Step 1: Write the proportion equation
   111.32 : 153.60 = 69.88 : x
2. Step 2: Convert to fraction form
   111.32/153.60 = 69.88/x
3. Step 3: Cross multiply
   111.32x = 153.60 × 69.88
4. Step 4: Simplify right side
   111.32x = 10,733.57
5. Step 5: Solve for x
   x = 10,733.57/111.32
6. Step 6: Final answer
   x = 96.42