Finding the Fourth Proportional to 1,861.43, 2,568.80 and 1,022.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,861.43 : 2,568.80 = 1,022.12 : x
2. Step 2: Convert to fraction form
   1,861.43/2,568.80 = 1,022.12/x
3. Step 3: Cross multiply
   1,861.43x = 2,568.80 × 1,022.12
4. Step 4: Simplify right side
   1,861.43x = 2,625,621.86
5. Step 5: Solve for x
   x = 2,625,621.86/1,861.43
6. Step 6: Final answer
   x = 1,410.54