Finding the Fourth Proportional to 3,418.91, 5,123.41 and 1,857.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,418.91 : 5,123.41 = 1,857.59 : x
2. Step 2: Convert to fraction form
   3,418.91/5,123.41 = 1,857.59/x
3. Step 3: Cross multiply
   3,418.91x = 5,123.41 × 1,857.59
4. Step 4: Simplify right side
   3,418.91x = 9,517,164.92
5. Step 5: Solve for x
   x = 9,517,164.92/3,418.91
6. Step 6: Final answer
   x = 2,783.69