Finding the Fourth Proportional to 1,862.89, 2,570.72 and 1,023.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,862.89 : 2,570.72 = 1,023.57 : x
2. Step 2: Convert to fraction form
   1,862.89/2,570.72 = 1,023.57/x
3. Step 3: Cross multiply
   1,862.89x = 2,570.72 × 1,023.57
4. Step 4: Simplify right side
   1,862.89x = 2,631,311.87
5. Step 5: Solve for x
   x = 2,631,311.87/1,862.89
6. Step 6: Final answer
   x = 1,412.49