Finding the Fourth Proportional to 6,939.57, 10,405.62 and 3,039.42

Step by Step Solution

1. Step 1: Write the proportion equation
   6,939.57 : 10,405.62 = 3,039.42 : x
2. Step 2: Convert to fraction form
   6,939.57/10,405.62 = 3,039.42/x
3. Step 3: Cross multiply
   6,939.57x = 10,405.62 × 3,039.42
4. Step 4: Simplify right side
   6,939.57x = 31,627,049.54
5. Step 5: Solve for x
   x = 31,627,049.54/6,939.57
6. Step 6: Final answer
   x = 4,557.49