Finding the Fourth Proportional to 42.24, 58.37 and 31.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42.24 : 58.37 = 31.86 : x
2. Step 2: Convert to fraction form
   42.24/58.37 = 31.86/x
3. Step 3: Cross multiply
   42.24x = 58.37 × 31.86
4. Step 4: Simplify right side
   42.24x = 1,859.55
5. Step 5: Solve for x
   x = 1,859.55/42.24
6. Step 6: Final answer
   x = 44.02