Finding the Fourth Proportional to 42.72, 58.71 and 37.86

Step by Step Solution

1. Step 1: Write the proportion equation
   42.72 : 58.71 = 37.86 : x
2. Step 2: Convert to fraction form
   42.72/58.71 = 37.86/x
3. Step 3: Cross multiply
   42.72x = 58.71 × 37.86
4. Step 4: Simplify right side
   42.72x = 2,222.76
5. Step 5: Solve for x
   x = 2,222.76/42.72
6. Step 6: Final answer
   x = 52.03