Finding the Fourth Proportional to 16,778.96, 23,155.49 and 9,225.87

Step by Step Solution

1. Step 1: Write the proportion equation
   16,778.96 : 23,155.49 = 9,225.87 : x
2. Step 2: Convert to fraction form
   16,778.96/23,155.49 = 9,225.87/x
3. Step 3: Cross multiply
   16,778.96x = 23,155.49 × 9,225.87
4. Step 4: Simplify right side
   16,778.96x = 213,629,540.53
5. Step 5: Solve for x
   x = 213,629,540.53/16,778.96
6. Step 6: Final answer
   x = 12,731.99