Finding the Fourth Proportional to 1,857.84, 2,563.81 and 1,018.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,857.84 : 2,563.81 = 1,018.55 : x
2. Step 2: Convert to fraction form
   1,857.84/2,563.81 = 1,018.55/x
3. Step 3: Cross multiply
   1,857.84x = 2,563.81 × 1,018.55
4. Step 4: Simplify right side
   1,857.84x = 2,611,362.27
5. Step 5: Solve for x
   x = 2,611,362.27/1,857.84
6. Step 6: Final answer
   x = 1,405.59