Finding the Fourth Proportional to 8,158.50, 12,236.04 and 3,994.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,158.50 : 12,236.04 = 3,994.31 : x
2. Step 2: Convert to fraction form
   8,158.50/12,236.04 = 3,994.31/x
3. Step 3: Cross multiply
   8,158.50x = 12,236.04 × 3,994.31
4. Step 4: Simplify right side
   8,158.50x = 48,874,556.29
5. Step 5: Solve for x
   x = 48,874,556.29/8,158.50
6. Step 6: Final answer
   x = 5,990.63