Finding the Fourth Proportional to 1,408.69, 1,944.20 and 819.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.69 : 1,944.20 = 819.11 : x
2. Step 2: Convert to fraction form
   1,408.69/1,944.20 = 819.11/x
3. Step 3: Cross multiply
   1,408.69x = 1,944.20 × 819.11
4. Step 4: Simplify right side
   1,408.69x = 1,592,520.57
5. Step 5: Solve for x
   x = 1,592,520.57/1,408.69
6. Step 6: Final answer
   x = 1,130.50