Finding the Fourth Proportional to 111.37, 165.94 and 99.24

Step by Step Solution

1. Step 1: Write the proportion equation
   111.37 : 165.94 = 99.24 : x
2. Step 2: Convert to fraction form
   111.37/165.94 = 99.24/x
3. Step 3: Cross multiply
   111.37x = 165.94 × 99.24
4. Step 4: Simplify right side
   111.37x = 16,468.63
5. Step 5: Solve for x
   x = 16,468.63/111.37
6. Step 6: Final answer
   x = 147.88