Finding the Fourth Proportional to 2,856.11, 3,926.31 and 2,456.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,856.11 : 3,926.31 = 2,456.30 : x
2. Step 2: Convert to fraction form
   2,856.11/3,926.31 = 2,456.30/x
3. Step 3: Cross multiply
   2,856.11x = 3,926.31 × 2,456.30
4. Step 4: Simplify right side
   2,856.11x = 9,644,195.25
5. Step 5: Solve for x
   x = 9,644,195.25/2,856.11
6. Step 6: Final answer
   x = 3,376.69