Finding the Fourth Proportional to 6,389.72, 9,580.62 and 3,618.26

Step by Step Solution

1. Step 1: Write the proportion equation
   6,389.72 : 9,580.62 = 3,618.26 : x
2. Step 2: Convert to fraction form
   6,389.72/9,580.62 = 3,618.26/x
3. Step 3: Cross multiply
   6,389.72x = 9,580.62 × 3,618.26
4. Step 4: Simplify right side
   6,389.72x = 34,665,174.12
5. Step 5: Solve for x
   x = 34,665,174.12/6,389.72
6. Step 6: Final answer
   x = 5,425.15