Finding the Fourth Proportional to 7,665.89, 10,579.90 and 4,681.09

Step by Step Solution

1. Step 1: Write the proportion equation
   7,665.89 : 10,579.90 = 4,681.09 : x
2. Step 2: Convert to fraction form
   7,665.89/10,579.90 = 4,681.09/x
3. Step 3: Cross multiply
   7,665.89x = 10,579.90 × 4,681.09
4. Step 4: Simplify right side
   7,665.89x = 49,525,474.39
5. Step 5: Solve for x
   x = 49,525,474.39/7,665.89
6. Step 6: Final answer
   x = 6,460.50