Finding the Fourth Proportional to 144.76, 199.83 and 86.56

Step by Step Solution

1. Step 1: Write the proportion equation
   144.76 : 199.83 = 86.56 : x
2. Step 2: Convert to fraction form
   144.76/199.83 = 86.56/x
3. Step 3: Cross multiply
   144.76x = 199.83 × 86.56
4. Step 4: Simplify right side
   144.76x = 17,297.28
5. Step 5: Solve for x
   x = 17,297.28/144.76
6. Step 6: Final answer
   x = 119.49