Finding the Fourth Proportional to 3,103.98, 4,280.54 and 2,039.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,103.98 : 4,280.54 = 2,039.86 : x
2. Step 2: Convert to fraction form
   3,103.98/4,280.54 = 2,039.86/x
3. Step 3: Cross multiply
   3,103.98x = 4,280.54 × 2,039.86
4. Step 4: Simplify right side
   3,103.98x = 8,731,702.32
5. Step 5: Solve for x
   x = 8,731,702.32/3,103.98
6. Step 6: Final answer
   x = 2,813.07