Finding the Fourth Proportional to 2,857.42, 3,944.96 and 1,864.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,857.42 : 3,944.96 = 1,864.42 : x
2. Step 2: Convert to fraction form
   2,857.42/3,944.96 = 1,864.42/x
3. Step 3: Cross multiply
   2,857.42x = 3,944.96 × 1,864.42
4. Step 4: Simplify right side
   2,857.42x = 7,355,062.32
5. Step 5: Solve for x
   x = 7,355,062.32/2,857.42
6. Step 6: Final answer
   x = 2,574.02