Finding the Fourth Proportional to 2,853.98, 3,935.38 and 1,857.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,853.98 : 3,935.38 = 1,857.42 : x
2. Step 2: Convert to fraction form
   2,853.98/3,935.38 = 1,857.42/x
3. Step 3: Cross multiply
   2,853.98x = 3,935.38 × 1,857.42
4. Step 4: Simplify right side
   2,853.98x = 7,309,653.52
5. Step 5: Solve for x
   x = 7,309,653.52/2,853.98
6. Step 6: Final answer
   x = 2,561.21