Finding the Fourth Proportional to 2,581.59, 3,874.23 and 939.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,581.59 : 3,874.23 = 939.54 : x
2. Step 2: Convert to fraction form
   2,581.59/3,874.23 = 939.54/x
3. Step 3: Cross multiply
   2,581.59x = 3,874.23 × 939.54
4. Step 4: Simplify right side
   2,581.59x = 3,639,994.05
5. Step 5: Solve for x
   x = 3,639,994.05/2,581.59
6. Step 6: Final answer
   x = 1,409.98