Finding the Fourth Proportional to 5,792.38, 7,993.43 and 3,139.72

Step by Step Solution

1. Step 1: Write the proportion equation
   5,792.38 : 7,993.43 = 3,139.72 : x
2. Step 2: Convert to fraction form
   5,792.38/7,993.43 = 3,139.72/x
3. Step 3: Cross multiply
   5,792.38x = 7,993.43 × 3,139.72
4. Step 4: Simplify right side
   5,792.38x = 25,097,099.92
5. Step 5: Solve for x
   x = 25,097,099.92/5,792.38
6. Step 6: Final answer
   x = 4,332.78