Finding the Fourth Proportional to 10,786.37, 16,157.69 and 5,581.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,786.37 : 16,157.69 = 5,581.31 : x
2. Step 2: Convert to fraction form
   10,786.37/16,157.69 = 5,581.31/x
3. Step 3: Cross multiply
   10,786.37x = 16,157.69 × 5,581.31
4. Step 4: Simplify right side
   10,786.37x = 90,181,089.26
5. Step 5: Solve for x
   x = 90,181,089.26/10,786.37
6. Step 6: Final answer
   x = 8,360.65