Finding the Fourth Proportional to 12,810.69, 17,676.45 and 9,456.39

Step by Step Solution

1. Step 1: Write the proportion equation
   12,810.69 : 17,676.45 = 9,456.39 : x
2. Step 2: Convert to fraction form
   12,810.69/17,676.45 = 9,456.39/x
3. Step 3: Cross multiply
   12,810.69x = 17,676.45 × 9,456.39
4. Step 4: Simplify right side
   12,810.69x = 167,155,405.02
5. Step 5: Solve for x
   x = 167,155,405.02/12,810.69
6. Step 6: Final answer
   x = 13,048.12