Finding the Fourth Proportional to 28,456.98, 39,270.60 and 16,520.82

Step by Step Solution

1. Step 1: Write the proportion equation
   28,456.98 : 39,270.60 = 16,520.82 : x
2. Step 2: Convert to fraction form
   28,456.98/39,270.60 = 16,520.82/x
3. Step 3: Cross multiply
   28,456.98x = 39,270.60 × 16,520.82
4. Step 4: Simplify right side
   28,456.98x = 648,782,513.89
5. Step 5: Solve for x
   x = 648,782,513.89/28,456.98
6. Step 6: Final answer
   x = 22,798.71