Finding the Fourth Proportional to 109.55, 151.25 and 86.33

Step by Step Solution

1. Step 1: Write the proportion equation
   109.55 : 151.25 = 86.33 : x
2. Step 2: Convert to fraction form
   109.55/151.25 = 86.33/x
3. Step 3: Cross multiply
   109.55x = 151.25 × 86.33
4. Step 4: Simplify right side
   109.55x = 13,056.22
5. Step 5: Solve for x
   x = 13,056.22/109.55
6. Step 6: Final answer
   x = 119.19