Finding the Fourth Proportional to 1,814.91, 2,504.87 and 1,028.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,814.91 : 2,504.87 = 1,028.80 : x
2. Step 2: Convert to fraction form
   1,814.91/2,504.87 = 1,028.80/x
3. Step 3: Cross multiply
   1,814.91x = 2,504.87 × 1,028.80
4. Step 4: Simplify right side
   1,814.91x = 2,577,017.89
5. Step 5: Solve for x
   x = 2,577,017.89/1,814.91
6. Step 6: Final answer
   x = 1,419.92