Finding the Fourth Proportional to 5,792.43, 7,993.34 and 3,139.79

Step by Step Solution

1. Step 1: Write the proportion equation
   5,792.43 : 7,993.34 = 3,139.79 : x
2. Step 2: Convert to fraction form
   5,792.43/7,993.34 = 3,139.79/x
3. Step 3: Cross multiply
   5,792.43x = 7,993.34 × 3,139.79
4. Step 4: Simplify right side
   5,792.43x = 25,097,382.77
5. Step 5: Solve for x
   x = 25,097,382.77/5,792.43
6. Step 6: Final answer
   x = 4,332.79