Finding the Fourth Proportional to 12,268.89, 16,940.61 and 9,431.87

Step by Step Solution

1. Step 1: Write the proportion equation
   12,268.89 : 16,940.61 = 9,431.87 : x
2. Step 2: Convert to fraction form
   12,268.89/16,940.61 = 9,431.87/x
3. Step 3: Cross multiply
   12,268.89x = 16,940.61 × 9,431.87
4. Step 4: Simplify right side
   12,268.89x = 159,781,546.54
5. Step 5: Solve for x
   x = 159,781,546.54/12,268.89
6. Step 6: Final answer
   x = 13,023.31