Finding the Fourth Proportional to 6,078.82, 8,387.90 and 3,390.04

Step by Step Solution

1. Step 1: Write the proportion equation
   6,078.82 : 8,387.90 = 3,390.04 : x
2. Step 2: Convert to fraction form
   6,078.82/8,387.90 = 3,390.04/x
3. Step 3: Cross multiply
   6,078.82x = 8,387.90 × 3,390.04
4. Step 4: Simplify right side
   6,078.82x = 28,435,316.52
5. Step 5: Solve for x
   x = 28,435,316.52/6,078.82
6. Step 6: Final answer
   x = 4,677.77