Finding the Fourth Proportional to 1,408.41, 1,943.72 and 818.91

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.41 : 1,943.72 = 818.91 : x
2. Step 2: Convert to fraction form
   1,408.41/1,943.72 = 818.91/x
3. Step 3: Cross multiply
   1,408.41x = 1,943.72 × 818.91
4. Step 4: Simplify right side
   1,408.41x = 1,591,728.04
5. Step 5: Solve for x
   x = 1,591,728.04/1,408.41
6. Step 6: Final answer
   x = 1,130.16