Finding the Fourth Proportional to 7,042.69, 10,574.42 and 3,928.78

Step by Step Solution

1. Step 1: Write the proportion equation
   7,042.69 : 10,574.42 = 3,928.78 : x
2. Step 2: Convert to fraction form
   7,042.69/10,574.42 = 3,928.78/x
3. Step 3: Cross multiply
   7,042.69x = 10,574.42 × 3,928.78
4. Step 4: Simplify right side
   7,042.69x = 41,544,550.16
5. Step 5: Solve for x
   x = 41,544,550.16/7,042.69
6. Step 6: Final answer
   x = 5,898.96