Finding the Fourth Proportional to 21,265.29, 31,904.18 and 8,786.03

Step by Step Solution

1. Step 1: Write the proportion equation
   21,265.29 : 31,904.18 = 8,786.03 : x
2. Step 2: Convert to fraction form
   21,265.29/31,904.18 = 8,786.03/x
3. Step 3: Cross multiply
   21,265.29x = 31,904.18 × 8,786.03
4. Step 4: Simplify right side
   21,265.29x = 280,310,879.15
5. Step 5: Solve for x
   x = 280,310,879.15/21,265.29
6. Step 6: Final answer
   x = 13,181.62