Finding the Fourth Proportional to 9,086.81, 12,540.96 and 5,108.09

Step by Step Solution

1. Step 1: Write the proportion equation
   9,086.81 : 12,540.96 = 5,108.09 : x
2. Step 2: Convert to fraction form
   9,086.81/12,540.96 = 5,108.09/x
3. Step 3: Cross multiply
   9,086.81x = 12,540.96 × 5,108.09
4. Step 4: Simplify right side
   9,086.81x = 64,060,289.66
5. Step 5: Solve for x
   x = 64,060,289.66/9,086.81
6. Step 6: Final answer
   x = 7,049.81