Finding the Fourth Proportional to 6,280.18, 8,666.49 and 3,485.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,280.18 : 8,666.49 = 3,485.50 : x
2. Step 2: Convert to fraction form
   6,280.18/8,666.49 = 3,485.50/x
3. Step 3: Cross multiply
   6,280.18x = 8,666.49 × 3,485.50
4. Step 4: Simplify right side
   6,280.18x = 30,207,050.90
5. Step 5: Solve for x
   x = 30,207,050.90/6,280.18
6. Step 6: Final answer
   x = 4,809.90