Finding the Fourth Proportional to 42.92, 59.24 and 28.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42.92 : 59.24 = 28.42 : x
2. Step 2: Convert to fraction form
   42.92/59.24 = 28.42/x
3. Step 3: Cross multiply
   42.92x = 59.24 × 28.42
4. Step 4: Simplify right side
   42.92x = 1,683.60
5. Step 5: Solve for x
   x = 1,683.60/42.92
6. Step 6: Final answer
   x = 39.23