Finding the Fourth Proportional to 10,786.20, 16,179.29 and 3,391.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,786.20 : 16,179.29 = 3,391.31 : x
2. Step 2: Convert to fraction form
   10,786.20/16,179.29 = 3,391.31/x
3. Step 3: Cross multiply
   10,786.20x = 16,179.29 × 3,391.31
4. Step 4: Simplify right side
   10,786.20x = 54,868,902.83
5. Step 5: Solve for x
   x = 54,868,902.83/10,786.20
6. Step 6: Final answer
   x = 5,086.95