Finding the Fourth Proportional to 111.85, 154.33 and 65.23

Step by Step Solution

1. Step 1: Write the proportion equation
   111.85 : 154.33 = 65.23 : x
2. Step 2: Convert to fraction form
   111.85/154.33 = 65.23/x
3. Step 3: Cross multiply
   111.85x = 154.33 × 65.23
4. Step 4: Simplify right side
   111.85x = 10,066.40
5. Step 5: Solve for x
   x = 10,066.40/111.85
6. Step 6: Final answer
   x = 90.00