Finding the Fourth Proportional to 16,990.56, 25,494.48 and 8,782.56

Step by Step Solution

1. Step 1: Write the proportion equation
   16,990.56 : 25,494.48 = 8,782.56 : x
2. Step 2: Convert to fraction form
   16,990.56/25,494.48 = 8,782.56/x
3. Step 3: Cross multiply
   16,990.56x = 25,494.48 × 8,782.56
4. Step 4: Simplify right side
   16,990.56x = 223,906,800.27
5. Step 5: Solve for x
   x = 223,906,800.27/16,990.56
6. Step 6: Final answer
   x = 13,178.31