Finding the Fourth Proportional to 7,920.09, 10,919.79 and 5,082.45

Step by Step Solution

1. Step 1: Write the proportion equation
   7,920.09 : 10,919.79 = 5,082.45 : x
2. Step 2: Convert to fraction form
   7,920.09/10,919.79 = 5,082.45/x
3. Step 3: Cross multiply
   7,920.09x = 10,919.79 × 5,082.45
4. Step 4: Simplify right side
   7,920.09x = 55,499,286.69
5. Step 5: Solve for x
   x = 55,499,286.69/7,920.09
6. Step 6: Final answer
   x = 7,007.41