Finding the Fourth Proportional to 111.99, 154.55 and 65.37

Step by Step Solution

1. Step 1: Write the proportion equation
   111.99 : 154.55 = 65.37 : x
2. Step 2: Convert to fraction form
   111.99/154.55 = 65.37/x
3. Step 3: Cross multiply
   111.99x = 154.55 × 65.37
4. Step 4: Simplify right side
   111.99x = 10,102.61
5. Step 5: Solve for x
   x = 10,102.61/111.99
6. Step 6: Final answer
   x = 90.21