Finding the Fourth Proportional to 1,408.75, 1,943.89 and 819.07

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.75 : 1,943.89 = 819.07 : x
2. Step 2: Convert to fraction form
   1,408.75/1,943.89 = 819.07/x
3. Step 3: Cross multiply
   1,408.75x = 1,943.89 × 819.07
4. Step 4: Simplify right side
   1,408.75x = 1,592,181.98
5. Step 5: Solve for x
   x = 1,592,181.98/1,408.75
6. Step 6: Final answer
   x = 1,130.21