Finding the Fourth Proportional to 8,131.86, 12,194.73 and 3,198.80

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.86 : 12,194.73 = 3,198.80 : x
2. Step 2: Convert to fraction form
   8,131.86/12,194.73 = 3,198.80/x
3. Step 3: Cross multiply
   8,131.86x = 12,194.73 × 3,198.80
4. Step 4: Simplify right side
   8,131.86x = 39,008,532.81
5. Step 5: Solve for x
   x = 39,008,532.81/8,131.86
6. Step 6: Final answer
   x = 4,797.00