Finding the Fourth Proportional to 111.27, 153.50 and 69.80

Step by Step Solution

1. Step 1: Write the proportion equation
   111.27 : 153.50 = 69.80 : x
2. Step 2: Convert to fraction form
   111.27/153.50 = 69.80/x
3. Step 3: Cross multiply
   111.27x = 153.50 × 69.80
4. Step 4: Simplify right side
   111.27x = 10,713.18
5. Step 5: Solve for x
   x = 10,713.18/111.27
6. Step 6: Final answer
   x = 96.28