Finding the Fourth Proportional to 42.34, 58.38 and 28.52

Step by Step Solution

1. Step 1: Write the proportion equation
   42.34 : 58.38 = 28.52 : x
2. Step 2: Convert to fraction form
   42.34/58.38 = 28.52/x
3. Step 3: Cross multiply
   42.34x = 58.38 × 28.52
4. Step 4: Simplify right side
   42.34x = 1,665.00
5. Step 5: Solve for x
   x = 1,665.00/42.34
6. Step 6: Final answer
   x = 39.32