Finding the Fourth Proportional to 3,100.28, 4,279.83 and 2,039.59

Step by Step Solution

1. Step 1: Write the proportion equation
   3,100.28 : 4,279.83 = 2,039.59 : x
2. Step 2: Convert to fraction form
   3,100.28/4,279.83 = 2,039.59/x
3. Step 3: Cross multiply
   3,100.28x = 4,279.83 × 2,039.59
4. Step 4: Simplify right side
   3,100.28x = 8,729,080.12
5. Step 5: Solve for x
   x = 8,729,080.12/3,100.28
6. Step 6: Final answer
   x = 2,815.58