Finding the Fourth Proportional to 2,582.58, 3,874.50 and 939.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,582.58 : 3,874.50 = 939.60 : x
2. Step 2: Convert to fraction form
   2,582.58/3,874.50 = 939.60/x
3. Step 3: Cross multiply
   2,582.58x = 3,874.50 × 939.60
4. Step 4: Simplify right side
   2,582.58x = 3,640,480.20
5. Step 5: Solve for x
   x = 3,640,480.20/2,582.58
6. Step 6: Final answer
   x = 1,409.63