Finding the Fourth Proportional to 1,408.90, 1,943.46 and 819.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.90 : 1,943.46 = 819.34 : x
2. Step 2: Convert to fraction form
   1,408.90/1,943.46 = 819.34/x
3. Step 3: Cross multiply
   1,408.90x = 1,943.46 × 819.34
4. Step 4: Simplify right side
   1,408.90x = 1,592,354.52
5. Step 5: Solve for x
   x = 1,592,354.52/1,408.90
6. Step 6: Final answer
   x = 1,130.21