Finding the Fourth Proportional to 12,806.89, 17,672.96 and 9,448.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,806.89 : 17,672.96 = 9,448.49 : x
2. Step 2: Convert to fraction form
   12,806.89/17,672.96 = 9,448.49/x
3. Step 3: Cross multiply
   12,806.89x = 17,672.96 × 9,448.49
4. Step 4: Simplify right side
   12,806.89x = 166,982,738.59
5. Step 5: Solve for x
   x = 166,982,738.59/12,806.89
6. Step 6: Final answer
   x = 13,038.51