Finding the Fourth Proportional to 1,408.91, 1,943.97 and 819.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.91 : 1,943.97 = 819.49 : x
2. Step 2: Convert to fraction form
   1,408.91/1,943.97 = 819.49/x
3. Step 3: Cross multiply
   1,408.91x = 1,943.97 × 819.49
4. Step 4: Simplify right side
   1,408.91x = 1,593,054.26
5. Step 5: Solve for x
   x = 1,593,054.26/1,408.91
6. Step 6: Final answer
   x = 1,130.70