Finding the Fourth Proportional to 9,993.57, 13,789.74 and 5,744.31

Step by Step Solution

1. Step 1: Write the proportion equation
   9,993.57 : 13,789.74 = 5,744.31 : x
2. Step 2: Convert to fraction form
   9,993.57/13,789.74 = 5,744.31/x
3. Step 3: Cross multiply
   9,993.57x = 13,789.74 × 5,744.31
4. Step 4: Simplify right side
   9,993.57x = 79,212,541.38
5. Step 5: Solve for x
   x = 79,212,541.38/9,993.57
6. Step 6: Final answer
   x = 7,926.35