Finding the Fourth Proportional to 1,408.55, 1,943.73 and 818.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.55 : 1,943.73 = 818.99 : x
2. Step 2: Convert to fraction form
   1,408.55/1,943.73 = 818.99/x
3. Step 3: Cross multiply
   1,408.55x = 1,943.73 × 818.99
4. Step 4: Simplify right side
   1,408.55x = 1,591,895.43
5. Step 5: Solve for x
   x = 1,591,895.43/1,408.55
6. Step 6: Final answer
   x = 1,130.17