Finding the Fourth Proportional to 6,445.69, 8,896.67 and 3,960.25

Step by Step Solution

1. Step 1: Write the proportion equation
   6,445.69 : 8,896.67 = 3,960.25 : x
2. Step 2: Convert to fraction form
   6,445.69/8,896.67 = 3,960.25/x
3. Step 3: Cross multiply
   6,445.69x = 8,896.67 × 3,960.25
4. Step 4: Simplify right side
   6,445.69x = 35,233,017.57
5. Step 5: Solve for x
   x = 35,233,017.57/6,445.69
6. Step 6: Final answer
   x = 5,466.14