Finding the Fourth Proportional to 6,485.85, 8,951.31 and 3,967.47

Step by Step Solution

1. Step 1: Write the proportion equation
   6,485.85 : 8,951.31 = 3,967.47 : x
2. Step 2: Convert to fraction form
   6,485.85/8,951.31 = 3,967.47/x
3. Step 3: Cross multiply
   6,485.85x = 8,951.31 × 3,967.47
4. Step 4: Simplify right side
   6,485.85x = 35,514,053.89
5. Step 5: Solve for x
   x = 35,514,053.89/6,485.85
6. Step 6: Final answer
   x = 5,475.62