Finding the Fourth Proportional to 12,644.09, 17,445.34 and 8,168.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,644.09 : 17,445.34 = 8,168.03 : x
2. Step 2: Convert to fraction form
   12,644.09/17,445.34 = 8,168.03/x
3. Step 3: Cross multiply
   12,644.09x = 17,445.34 × 8,168.03
4. Step 4: Simplify right side
   12,644.09x = 142,494,060.48
5. Step 5: Solve for x
   x = 142,494,060.48/12,644.09
6. Step 6: Final answer
   x = 11,269.62