Finding the Fourth Proportional to 109.09, 150.42 and 88.42

Step by Step Solution

1. Step 1: Write the proportion equation
   109.09 : 150.42 = 88.42 : x
2. Step 2: Convert to fraction form
   109.09/150.42 = 88.42/x
3. Step 3: Cross multiply
   109.09x = 150.42 × 88.42
4. Step 4: Simplify right side
   109.09x = 13,300.14
5. Step 5: Solve for x
   x = 13,300.14/109.09
6. Step 6: Final answer
   x = 121.92