Finding the Fourth Proportional to 6,072.94, 8,380.77 and 3,420.39

Step by Step Solution

1. Step 1: Write the proportion equation
   6,072.94 : 8,380.77 = 3,420.39 : x
2. Step 2: Convert to fraction form
   6,072.94/8,380.77 = 3,420.39/x
3. Step 3: Cross multiply
   6,072.94x = 8,380.77 × 3,420.39
4. Step 4: Simplify right side
   6,072.94x = 28,665,520.50
5. Step 5: Solve for x
   x = 28,665,520.50/6,072.94
6. Step 6: Final answer
   x = 4,720.20