Finding the Fourth Proportional to 6,078.70, 8,389.34 and 3,426.15

Step by Step Solution

1. Step 1: Write the proportion equation
   6,078.70 : 8,389.34 = 3,426.15 : x
2. Step 2: Convert to fraction form
   6,078.70/8,389.34 = 3,426.15/x
3. Step 3: Cross multiply
   6,078.70x = 8,389.34 × 3,426.15
4. Step 4: Simplify right side
   6,078.70x = 28,743,137.24
5. Step 5: Solve for x
   x = 28,743,137.24/6,078.70
6. Step 6: Final answer
   x = 4,728.50