Finding the Fourth Proportional to 105.55, 158.33 and 28.52

Step by Step Solution

1. Step 1: Write the proportion equation
   105.55 : 158.33 = 28.52 : x
2. Step 2: Convert to fraction form
   105.55/158.33 = 28.52/x
3. Step 3: Cross multiply
   105.55x = 158.33 × 28.52
4. Step 4: Simplify right side
   105.55x = 4,515.69
5. Step 5: Solve for x
   x = 4,515.69/105.55
6. Step 6: Final answer
   x = 42.78