Finding the Fourth Proportional to 8,131.65, 12,190.18 and 2,936.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.65 : 12,190.18 = 2,936.31 : x
2. Step 2: Convert to fraction form
   8,131.65/12,190.18 = 2,936.31/x
3. Step 3: Cross multiply
   8,131.65x = 12,190.18 × 2,936.31
4. Step 4: Simplify right side
   8,131.65x = 35,794,071.80
5. Step 5: Solve for x
   x = 35,794,071.80/8,131.65
6. Step 6: Final answer
   x = 4,401.82