Finding the Fourth Proportional to 6,057.72, 8,359.62 and 3,405

Step by Step Solution

1. Step 1: Write the proportion equation
   6,057.72 : 8,359.62 = 3,405 : x
2. Step 2: Convert to fraction form
   6,057.72/8,359.62 = 3,405/x
3. Step 3: Cross multiply
   6,057.72x = 8,359.62 × 3,405
4. Step 4: Simplify right side
   6,057.72x = 28,464,506.10
5. Step 5: Solve for x
   x = 28,464,506.10/6,057.72
6. Step 6: Final answer
   x = 4,698.88