Finding the Fourth Proportional to 1,404.07, 2,105.41 and 819.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404.07 : 2,105.41 = 819.28 : x
2. Step 2: Convert to fraction form
   1,404.07/2,105.41 = 819.28/x
3. Step 3: Cross multiply
   1,404.07x = 2,105.41 × 819.28
4. Step 4: Simplify right side
   1,404.07x = 1,724,920.30
5. Step 5: Solve for x
   x = 1,724,920.30/1,404.07
6. Step 6: Final answer
   x = 1,228.51