Finding the Fourth Proportional to 1,408.17, 1,943.45 and 818.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,408.17 : 1,943.45 = 818.73 : x
2. Step 2: Convert to fraction form
   1,408.17/1,943.45 = 818.73/x
3. Step 3: Cross multiply
   1,408.17x = 1,943.45 × 818.73
4. Step 4: Simplify right side
   1,408.17x = 1,591,160.82
5. Step 5: Solve for x
   x = 1,591,160.82/1,408.17
6. Step 6: Final answer
   x = 1,129.95