Finding the Fourth Proportional to 42.28, 58.36 and 37.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42.28 : 58.36 = 37.15 : x
2. Step 2: Convert to fraction form
   42.28/58.36 = 37.15/x
3. Step 3: Cross multiply
   42.28x = 58.36 × 37.15
4. Step 4: Simplify right side
   42.28x = 2,167.89
5. Step 5: Solve for x
   x = 2,167.89/42.28
6. Step 6: Final answer
   x = 51.28