Finding the Fourth Proportional to 11,145.10, 16,704.15 and 6,456.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,145.10 : 16,704.15 = 6,456.10 : x
2. Step 2: Convert to fraction form
   11,145.10/16,704.15 = 6,456.10/x
3. Step 3: Cross multiply
   11,145.10x = 16,704.15 × 6,456.10
4. Step 4: Simplify right side
   11,145.10x = 107,843,662.82
5. Step 5: Solve for x
   x = 107,843,662.82/11,145.10
6. Step 6: Final answer
   x = 9,676.33