Finding the Fourth Proportional to 10,786.56, 16,198.40 and 5,865.81

Step by Step Solution

1. Step 1: Write the proportion equation
   10,786.56 : 16,198.40 = 5,865.81 : x
2. Step 2: Convert to fraction form
   10,786.56/16,198.40 = 5,865.81/x
3. Step 3: Cross multiply
   10,786.56x = 16,198.40 × 5,865.81
4. Step 4: Simplify right side
   10,786.56x = 95,016,736.70
5. Step 5: Solve for x
   x = 95,016,736.70/10,786.56
6. Step 6: Final answer
   x = 8,808.81