Finding the Fourth Proportional to 7,665.55, 10,578.75 and 4,308.30

Step by Step Solution

1. Step 1: Write the proportion equation
   7,665.55 : 10,578.75 = 4,308.30 : x
2. Step 2: Convert to fraction form
   7,665.55/10,578.75 = 4,308.30/x
3. Step 3: Cross multiply
   7,665.55x = 10,578.75 × 4,308.30
4. Step 4: Simplify right side
   7,665.55x = 45,576,354.19
5. Step 5: Solve for x
   x = 45,576,354.19/7,665.55
6. Step 6: Final answer
   x = 5,945.61