Finding the Fourth Proportional to 12,807.89, 17,674.34 and 9,449.49

Step by Step Solution

1. Step 1: Write the proportion equation
   12,807.89 : 17,674.34 = 9,449.49 : x
2. Step 2: Convert to fraction form
   12,807.89/17,674.34 = 9,449.49/x
3. Step 3: Cross multiply
   12,807.89x = 17,674.34 × 9,449.49
4. Step 4: Simplify right side
   12,807.89x = 167,013,451.84
5. Step 5: Solve for x
   x = 167,013,451.84/12,807.89
6. Step 6: Final answer
   x = 13,039.89