Finding the Fourth Proportional to 7,004.36, 9,665.57 and 3,860.55

Step by Step Solution

1. Step 1: Write the proportion equation
   7,004.36 : 9,665.57 = 3,860.55 : x
2. Step 2: Convert to fraction form
   7,004.36/9,665.57 = 3,860.55/x
3. Step 3: Cross multiply
   7,004.36x = 9,665.57 × 3,860.55
4. Step 4: Simplify right side
   7,004.36x = 37,314,396.96
5. Step 5: Solve for x
   x = 37,314,396.96/7,004.36
6. Step 6: Final answer
   x = 5,327.31