Finding the Fourth Proportional to 111.16, 153.37 and 69.71

Step by Step Solution

1. Step 1: Write the proportion equation
   111.16 : 153.37 = 69.71 : x
2. Step 2: Convert to fraction form
   111.16/153.37 = 69.71/x
3. Step 3: Cross multiply
   111.16x = 153.37 × 69.71
4. Step 4: Simplify right side
   111.16x = 10,691.63
5. Step 5: Solve for x
   x = 10,691.63/111.16
6. Step 6: Final answer
   x = 96.18