Finding the Fourth Proportional to 16,991.56, 25,495.98 and 8,783.56

Step by Step Solution

1. Step 1: Write the proportion equation
   16,991.56 : 25,495.98 = 8,783.56 : x
2. Step 2: Convert to fraction form
   16,991.56/25,495.98 = 8,783.56/x
3. Step 3: Cross multiply
   16,991.56x = 25,495.98 × 8,783.56
4. Step 4: Simplify right side
   16,991.56x = 223,945,470.09
5. Step 5: Solve for x
   x = 223,945,470.09/16,991.56
6. Step 6: Final answer
   x = 13,179.81