Finding the Fourth Proportional to 2,839.38, 4,259.60 and 1,279.43

Step by Step Solution

1. Step 1: Write the proportion equation
   2,839.38 : 4,259.60 = 1,279.43 : x
2. Step 2: Convert to fraction form
   2,839.38/4,259.60 = 1,279.43/x
3. Step 3: Cross multiply
   2,839.38x = 4,259.60 × 1,279.43
4. Step 4: Simplify right side
   2,839.38x = 5,449,832.33
5. Step 5: Solve for x
   x = 5,449,832.33/2,839.38
6. Step 6: Final answer
   x = 1,919.37