Finding the Fourth Proportional to 8,680.23, 13,014.53 and 3,993.89

Step by Step Solution

1. Step 1: Write the proportion equation
   8,680.23 : 13,014.53 = 3,993.89 : x
2. Step 2: Convert to fraction form
   8,680.23/13,014.53 = 3,993.89/x
3. Step 3: Cross multiply
   8,680.23x = 13,014.53 × 3,993.89
4. Step 4: Simplify right side
   8,680.23x = 51,978,662.08
5. Step 5: Solve for x
   x = 51,978,662.08/8,680.23
6. Step 6: Final answer
   x = 5,988.17