Finding the Fourth Proportional to 6,453.99, 9,681.89 and 3,167.21

Step by Step Solution

1. Step 1: Write the proportion equation
   6,453.99 : 9,681.89 = 3,167.21 : x
2. Step 2: Convert to fraction form
   6,453.99/9,681.89 = 3,167.21/x
3. Step 3: Cross multiply
   6,453.99x = 9,681.89 × 3,167.21
4. Step 4: Simplify right side
   6,453.99x = 30,664,578.83
5. Step 5: Solve for x
   x = 30,664,578.83/6,453.99
6. Step 6: Final answer
   x = 4,751.26