Finding the Fourth Proportional to 7,086.72, 10,609.58 and 5,339.10

Step by Step Solution

1. Step 1: Write the proportion equation
   7,086.72 : 10,609.58 = 5,339.10 : x
2. Step 2: Convert to fraction form
   7,086.72/10,609.58 = 5,339.10/x
3. Step 3: Cross multiply
   7,086.72x = 10,609.58 × 5,339.10
4. Step 4: Simplify right side
   7,086.72x = 56,645,581.88
5. Step 5: Solve for x
   x = 56,645,581.88/7,086.72
6. Step 6: Final answer
   x = 7,993.20