Finding the Fourth Proportional to 7,042.87, 9,718.86 and 3,856.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,042.87 : 9,718.86 = 3,856.10 : x
2. Step 2: Convert to fraction form
   7,042.87/9,718.86 = 3,856.10/x
3. Step 3: Cross multiply
   7,042.87x = 9,718.86 × 3,856.10
4. Step 4: Simplify right side
   7,042.87x = 37,476,922.30
5. Step 5: Solve for x
   x = 37,476,922.30/7,042.87
6. Step 6: Final answer
   x = 5,321.26