Finding the Fourth Proportional to 105.42, 144.18 and 103.83

Step by Step Solution

1. Step 1: Write the proportion equation
   105.42 : 144.18 = 103.83 : x
2. Step 2: Convert to fraction form
   105.42/144.18 = 103.83/x
3. Step 3: Cross multiply
   105.42x = 144.18 × 103.83
4. Step 4: Simplify right side
   105.42x = 14,970.21
5. Step 5: Solve for x
   x = 14,970.21/105.42
6. Step 6: Final answer
   x = 142.01