Finding the Fourth Proportional to 42.47, 58.56 and 37.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42.47 : 58.56 = 37.31 : x
2. Step 2: Convert to fraction form
   42.47/58.56 = 37.31/x
3. Step 3: Cross multiply
   42.47x = 58.56 × 37.31
4. Step 4: Simplify right side
   42.47x = 2,184.87
5. Step 5: Solve for x
   x = 2,184.87/42.47
6. Step 6: Final answer
   x = 51.45