Finding the Fourth Proportional to 16,687.56, 25,036.47 and 8,890.50

Step by Step Solution

1. Step 1: Write the proportion equation
   16,687.56 : 25,036.47 = 8,890.50 : x
2. Step 2: Convert to fraction form
   16,687.56/25,036.47 = 8,890.50/x
3. Step 3: Cross multiply
   16,687.56x = 25,036.47 × 8,890.50
4. Step 4: Simplify right side
   16,687.56x = 222,586,736.54
5. Step 5: Solve for x
   x = 222,586,736.54/16,687.56
6. Step 6: Final answer
   x = 13,338.48