Finding the Fourth Proportional to 10,786.63, 16,158.07 and 5,581.57

Step by Step Solution

1. Step 1: Write the proportion equation
   10,786.63 : 16,158.07 = 5,581.57 : x
2. Step 2: Convert to fraction form
   10,786.63/16,158.07 = 5,581.57/x
3. Step 3: Cross multiply
   10,786.63x = 16,158.07 × 5,581.57
4. Step 4: Simplify right side
   10,786.63x = 90,187,290.07
5. Step 5: Solve for x
   x = 90,187,290.07/10,786.63
6. Step 6: Final answer
   x = 8,361.03