Finding the Fourth Proportional to 1,814.67, 2,504.28 and 1,028.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,814.67 : 2,504.28 = 1,028.72 : x
2. Step 2: Convert to fraction form
   1,814.67/2,504.28 = 1,028.72/x
3. Step 3: Cross multiply
   1,814.67x = 2,504.28 × 1,028.72
4. Step 4: Simplify right side
   1,814.67x = 2,576,209.18
5. Step 5: Solve for x
   x = 2,576,209.18/1,814.67
6. Step 6: Final answer
   x = 1,419.65