Finding the Fourth Proportional to 111.83, 154.28 and 65.19

Step by Step Solution

1. Step 1: Write the proportion equation
   111.83 : 154.28 = 65.19 : x
2. Step 2: Convert to fraction form
   111.83/154.28 = 65.19/x
3. Step 3: Cross multiply
   111.83x = 154.28 × 65.19
4. Step 4: Simplify right side
   111.83x = 10,058.25
5. Step 5: Solve for x
   x = 10,058.25/111.83
6. Step 6: Final answer
   x = 89.94