Finding the Fourth Proportional to 2,857.01, 4,285.98 and 1,396.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,857.01 : 4,285.98 = 1,396.31 : x
2. Step 2: Convert to fraction form
   2,857.01/4,285.98 = 1,396.31/x
3. Step 3: Cross multiply
   2,857.01x = 4,285.98 × 1,396.31
4. Step 4: Simplify right side
   2,857.01x = 5,984,535.30
5. Step 5: Solve for x
   x = 5,984,535.30/2,857.01
6. Step 6: Final answer
   x = 2,094.69