Finding the Fourth Proportional to 144.76, 199.72 and 105.96

Step by Step Solution

1. Step 1: Write the proportion equation
   144.76 : 199.72 = 105.96 : x
2. Step 2: Convert to fraction form
   144.76/199.72 = 105.96/x
3. Step 3: Cross multiply
   144.76x = 199.72 × 105.96
4. Step 4: Simplify right side
   144.76x = 21,162.33
5. Step 5: Solve for x
   x = 21,162.33/144.76
6. Step 6: Final answer
   x = 146.19