Finding the Fourth Proportional to 8,383.16, 12,571.72 and 3,116.96

Step by Step Solution

1. Step 1: Write the proportion equation
   8,383.16 : 12,571.72 = 3,116.96 : x
2. Step 2: Convert to fraction form
   8,383.16/12,571.72 = 3,116.96/x
3. Step 3: Cross multiply
   8,383.16x = 12,571.72 × 3,116.96
4. Step 4: Simplify right side
   8,383.16x = 39,185,548.37
5. Step 5: Solve for x
   x = 39,185,548.37/8,383.16
6. Step 6: Final answer
   x = 4,674.32