Finding the Fourth Proportional to 111.33, 165.58 and 109.02

Step by Step Solution

1. Step 1: Write the proportion equation
   111.33 : 165.58 = 109.02 : x
2. Step 2: Convert to fraction form
   111.33/165.58 = 109.02/x
3. Step 3: Cross multiply
   111.33x = 165.58 × 109.02
4. Step 4: Simplify right side
   111.33x = 18,052.29
5. Step 5: Solve for x
   x = 18,052.29/111.33
6. Step 6: Final answer
   x = 162.15