Finding the Fourth Proportional to 7,042.56, 9,718.71 and 4,057.29

Step by Step Solution

1. Step 1: Write the proportion equation
   7,042.56 : 9,718.71 = 4,057.29 : x
2. Step 2: Convert to fraction form
   7,042.56/9,718.71 = 4,057.29/x
3. Step 3: Cross multiply
   7,042.56x = 9,718.71 × 4,057.29
4. Step 4: Simplify right side
   7,042.56x = 39,431,624.90
5. Step 5: Solve for x
   x = 39,431,624.90/7,042.56
6. Step 6: Final answer
   x = 5,599.05