Finding the Fourth Proportional to 7,143.33, 9,857.82 and 3,956.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,143.33 : 9,857.82 = 3,956.72 : x
2. Step 2: Convert to fraction form
   7,143.33/9,857.82 = 3,956.72/x
3. Step 3: Cross multiply
   7,143.33x = 9,857.82 × 3,956.72
4. Step 4: Simplify right side
   7,143.33x = 39,004,584.26
5. Step 5: Solve for x
   x = 39,004,584.26/7,143.33
6. Step 6: Final answer
   x = 5,460.28