Finding the Fourth Proportional to 1,857.71, 2,563.64 and 1,018.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,857.71 : 2,563.64 = 1,018.42 : x
2. Step 2: Convert to fraction form
   1,857.71/2,563.64 = 1,018.42/x
3. Step 3: Cross multiply
   1,857.71x = 2,563.64 × 1,018.42
4. Step 4: Simplify right side
   1,857.71x = 2,610,862.25
5. Step 5: Solve for x
   x = 2,610,862.25/1,857.71
6. Step 6: Final answer
   x = 1,405.42