Finding the Fourth Proportional to 7,086.05, 9,780.24 and 5,679.08

Step by Step Solution

1. Step 1: Write the proportion equation
   7,086.05 : 9,780.24 = 5,679.08 : x
2. Step 2: Convert to fraction form
   7,086.05/9,780.24 = 5,679.08/x
3. Step 3: Cross multiply
   7,086.05x = 9,780.24 × 5,679.08
4. Step 4: Simplify right side
   7,086.05x = 55,542,765.38
5. Step 5: Solve for x
   x = 55,542,765.38/7,086.05
6. Step 6: Final answer
   x = 7,838.33