Finding the Fourth Proportional to 51,936.72, 71,673 and 39,339.60

Step by Step Solution

1. Step 1: Write the proportion equation
   51,936.72 : 71,673 = 39,339.60 : x
2. Step 2: Convert to fraction form
   51,936.72/71,673 = 39,339.60/x
3. Step 3: Cross multiply
   51,936.72x = 71,673 × 39,339.60
4. Step 4: Simplify right side
   51,936.72x = 2,819,587,150.80
5. Step 5: Solve for x
   x = 2,819,587,150.80/51,936.72
6. Step 6: Final answer
   x = 54,288.90