Finding the Fourth Proportional to 1,408.17, 1,943.17 and 818.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.17 : 1,943.17 = 818.89 : x
2. Step 2: Convert to fraction form
   1,408.17/1,943.17 = 818.89/x
3. Step 3: Cross multiply
   1,408.17x = 1,943.17 × 818.89
4. Step 4: Simplify right side
   1,408.17x = 1,591,242.48
5. Step 5: Solve for x
   x = 1,591,242.48/1,408.17
6. Step 6: Final answer
   x = 1,130.01