Finding the Fourth Proportional to 1,861.37, 2,568.72 and 1,022.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,861.37 : 2,568.72 = 1,022.15 : x
2. Step 2: Convert to fraction form
   1,861.37/2,568.72 = 1,022.15/x
3. Step 3: Cross multiply
   1,861.37x = 2,568.72 × 1,022.15
4. Step 4: Simplify right side
   1,861.37x = 2,625,617.15
5. Step 5: Solve for x
   x = 2,625,617.15/1,861.37
6. Step 6: Final answer
   x = 1,410.58