Finding the Fourth Proportional to 1,861.27, 2,568.60 and 1,021.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,861.27 : 2,568.60 = 1,021.99 : x
2. Step 2: Convert to fraction form
   1,861.27/2,568.60 = 1,021.99/x
3. Step 3: Cross multiply
   1,861.27x = 2,568.60 × 1,021.99
4. Step 4: Simplify right side
   1,861.27x = 2,625,087.70
5. Step 5: Solve for x
   x = 2,625,087.70/1,861.27
6. Step 6: Final answer
   x = 1,410.37