Finding the Fourth Proportional to 105.63, 158.46 and 28.59

Step by Step Solution

1. Step 1: Write the proportion equation
   105.63 : 158.46 = 28.59 : x
2. Step 2: Convert to fraction form
   105.63/158.46 = 28.59/x
3. Step 3: Cross multiply
   105.63x = 158.46 × 28.59
4. Step 4: Simplify right side
   105.63x = 4,530.23
5. Step 5: Solve for x
   x = 4,530.23/105.63
6. Step 6: Final answer
   x = 42.89