Finding the Fourth Proportional to 8,632.86, 12,954.42 and 8,086.20

Step by Step Solution

1. Step 1: Write the proportion equation
   8,632.86 : 12,954.42 = 8,086.20 : x
2. Step 2: Convert to fraction form
   8,632.86/12,954.42 = 8,086.20/x
3. Step 3: Cross multiply
   8,632.86x = 12,954.42 × 8,086.20
4. Step 4: Simplify right side
   8,632.86x = 104,752,031.00
5. Step 5: Solve for x
   x = 104,752,031.00/8,632.86
6. Step 6: Final answer
   x = 12,134.11