Finding the Fourth Proportional to 16,821.89, 23,214.10 and 9,268.05

Step by Step Solution

1. Step 1: Write the proportion equation
   16,821.89 : 23,214.10 = 9,268.05 : x
2. Step 2: Convert to fraction form
   16,821.89/23,214.10 = 9,268.05/x
3. Step 3: Cross multiply
   16,821.89x = 23,214.10 × 9,268.05
4. Step 4: Simplify right side
   16,821.89x = 215,149,546.83
5. Step 5: Solve for x
   x = 215,149,546.83/16,821.89
6. Step 6: Final answer
   x = 12,789.85