Finding the Fourth Proportional to 6,416.82, 8,853.30 and 5,711.31

Step by Step Solution

1. Step 1: Write the proportion equation
   6,416.82 : 8,853.30 = 5,711.31 : x
2. Step 2: Convert to fraction form
   6,416.82/8,853.30 = 5,711.31/x
3. Step 3: Cross multiply
   6,416.82x = 8,853.30 × 5,711.31
4. Step 4: Simplify right side
   6,416.82x = 50,563,940.82
5. Step 5: Solve for x
   x = 50,563,940.82/6,416.82
6. Step 6: Final answer
   x = 7,879.91