Finding the Fourth Proportional to 7,040.43, 9,715.86 and 3,853.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,040.43 : 9,715.86 = 3,853.80 : x
2. Step 2: Convert to fraction form
   7,040.43/9,715.86 = 3,853.80/x
3. Step 3: Cross multiply
   7,040.43x = 9,715.86 × 3,853.80
4. Step 4: Simplify right side
   7,040.43x = 37,442,981.27
5. Step 5: Solve for x
   x = 37,442,981.27/7,040.43
6. Step 6: Final answer
   x = 5,318.28