Finding the Fourth Proportional to 1,857.94, 2,563.92 and 1,018.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,857.94 : 2,563.92 = 1,018.72 : x
2. Step 2: Convert to fraction form
   1,857.94/2,563.92 = 1,018.72/x
3. Step 3: Cross multiply
   1,857.94x = 2,563.92 × 1,018.72
4. Step 4: Simplify right side
   1,857.94x = 2,611,916.58
5. Step 5: Solve for x
   x = 2,611,916.58/1,857.94
6. Step 6: Final answer
   x = 1,405.81