Finding the Fourth Proportional to 8,464.07, 12,704.34 and 5,183.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,464.07 : 12,704.34 = 5,183.57 : x
2. Step 2: Convert to fraction form
   8,464.07/12,704.34 = 5,183.57/x
3. Step 3: Cross multiply
   8,464.07x = 12,704.34 × 5,183.57
4. Step 4: Simplify right side
   8,464.07x = 65,853,835.69
5. Step 5: Solve for x
   x = 65,853,835.69/8,464.07
6. Step 6: Final answer
   x = 7,780.40