Finding the Fourth Proportional to 16,890.30, 25,339.83 and 8,986.31

Step by Step Solution

1. Step 1: Write the proportion equation
   16,890.30 : 25,339.83 = 8,986.31 : x
2. Step 2: Convert to fraction form
   16,890.30/25,339.83 = 8,986.31/x
3. Step 3: Cross multiply
   16,890.30x = 25,339.83 × 8,986.31
4. Step 4: Simplify right side
   16,890.30x = 227,711,567.73
5. Step 5: Solve for x
   x = 227,711,567.73/16,890.30
6. Step 6: Final answer
   x = 13,481.80