Finding the Fourth Proportional to 11,170.57, 16,672.27 and 10,986.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,170.57 : 16,672.27 = 10,986.05 : x
2. Step 2: Convert to fraction form
   11,170.57/16,672.27 = 10,986.05/x
3. Step 3: Cross multiply
   11,170.57x = 16,672.27 × 10,986.05
4. Step 4: Simplify right side
   11,170.57x = 183,162,391.83
5. Step 5: Solve for x
   x = 183,162,391.83/11,170.57
6. Step 6: Final answer
   x = 16,396.87