Finding the Fourth Proportional to 9,949.50, 13,730.31 and 5,757.75

Step by Step Solution

1. Step 1: Write the proportion equation
   9,949.50 : 13,730.31 = 5,757.75 : x
2. Step 2: Convert to fraction form
   9,949.50/13,730.31 = 5,757.75/x
3. Step 3: Cross multiply
   9,949.50x = 13,730.31 × 5,757.75
4. Step 4: Simplify right side
   9,949.50x = 79,055,692.40
5. Step 5: Solve for x
   x = 79,055,692.40/9,949.50
6. Step 6: Final answer
   x = 7,945.70