Finding the Fourth Proportional to 51,456.45, 71,013.20 and 28,798.05

Step by Step Solution

1. Step 1: Write the proportion equation
   51,456.45 : 71,013.20 = 28,798.05 : x
2. Step 2: Convert to fraction form
   51,456.45/71,013.20 = 28,798.05/x
3. Step 3: Cross multiply
   51,456.45x = 71,013.20 × 28,798.05
4. Step 4: Simplify right side
   51,456.45x = 2,045,041,540.27
5. Step 5: Solve for x
   x = 2,045,041,540.27/51,456.45
6. Step 6: Final answer
   x = 39,743.15