Finding the Fourth Proportional to 1,423.78, 2,132.83 and 935.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.78 : 2,132.83 = 935.35 : x
2. Step 2: Convert to fraction form
   1,423.78/2,132.83 = 935.35/x
3. Step 3: Cross multiply
   1,423.78x = 2,132.83 × 935.35
4. Step 4: Simplify right side
   1,423.78x = 1,994,938.38
5. Step 5: Solve for x
   x = 1,994,938.38/1,423.78
6. Step 6: Final answer
   x = 1,401.16