Finding the Fourth Proportional to 7,040.22, 9,715.59 and 3,896.70

Step by Step Solution

1. Step 1: Write the proportion equation
   7,040.22 : 9,715.59 = 3,896.70 : x
2. Step 2: Convert to fraction form
   7,040.22/9,715.59 = 3,896.70/x
3. Step 3: Cross multiply
   7,040.22x = 9,715.59 × 3,896.70
4. Step 4: Simplify right side
   7,040.22x = 37,858,739.55
5. Step 5: Solve for x
   x = 37,858,739.55/7,040.22
6. Step 6: Final answer
   x = 5,377.49