Finding the Fourth Proportional to 42.14, 58.15 and 28.33

Step by Step Solution

1. Step 1: Write the proportion equation
   42.14 : 58.15 = 28.33 : x
2. Step 2: Convert to fraction form
   42.14/58.15 = 28.33/x
3. Step 3: Cross multiply
   42.14x = 58.15 × 28.33
4. Step 4: Simplify right side
   42.14x = 1,647.39
5. Step 5: Solve for x
   x = 1,647.39/42.14
6. Step 6: Final answer
   x = 39.09