Finding the Fourth Proportional to 111.99, 154.52 and 65.36

Step by Step Solution

1. Step 1: Write the proportion equation
   111.99 : 154.52 = 65.36 : x
2. Step 2: Convert to fraction form
   111.99/154.52 = 65.36/x
3. Step 3: Cross multiply
   111.99x = 154.52 × 65.36
4. Step 4: Simplify right side
   111.99x = 10,098.33
5. Step 5: Solve for x
   x = 10,098.33/111.99
6. Step 6: Final answer
   x = 90.17