Finding the Fourth Proportional to 20,685.69, 31,016.03 and 8,207.37

Step by Step Solution

1. Step 1: Write the proportion equation
   20,685.69 : 31,016.03 = 8,207.37 : x
2. Step 2: Convert to fraction form
   20,685.69/31,016.03 = 8,207.37/x
3. Step 3: Cross multiply
   20,685.69x = 31,016.03 × 8,207.37
4. Step 4: Simplify right side
   20,685.69x = 254,559,993.10
5. Step 5: Solve for x
   x = 254,559,993.10/20,685.69
6. Step 6: Final answer
   x = 12,306.09