Finding the Fourth Proportional to 12,809.82, 17,676.93 and 7,145.16

Step by Step Solution

1. Step 1: Write the proportion equation
   12,809.82 : 17,676.93 = 7,145.16 : x
2. Step 2: Convert to fraction form
   12,809.82/17,676.93 = 7,145.16/x
3. Step 3: Cross multiply
   12,809.82x = 17,676.93 × 7,145.16
4. Step 4: Simplify right side
   12,809.82x = 126,304,493.16
5. Step 5: Solve for x
   x = 126,304,493.16/12,809.82
6. Step 6: Final answer
   x = 9,859.97