Finding the Fourth Proportional to 144.72, 199.62 and 105.84

Step by Step Solution

1. Step 1: Write the proportion equation
   144.72 : 199.62 = 105.84 : x
2. Step 2: Convert to fraction form
   144.72/199.62 = 105.84/x
3. Step 3: Cross multiply
   144.72x = 199.62 × 105.84
4. Step 4: Simplify right side
   144.72x = 21,127.78
5. Step 5: Solve for x
   x = 21,127.78/144.72
6. Step 6: Final answer
   x = 145.99