Finding the Fourth Proportional to 51,608.43, 71,215.98 and 28,639.49

Step by Step Solution

1. Step 1: Write the proportion equation
   51,608.43 : 71,215.98 = 28,639.49 : x
2. Step 2: Convert to fraction form
   51,608.43/71,215.98 = 28,639.49/x
3. Step 3: Cross multiply
   51,608.43x = 71,215.98 × 28,639.49
4. Step 4: Simplify right side
   51,608.43x = 2,039,589,164.42
5. Step 5: Solve for x
   x = 2,039,589,164.42/51,608.43
6. Step 6: Final answer
   x = 39,520.46