Finding the Fourth Proportional to 10,168.04, 14,040.06 and 8,172.20

Step by Step Solution

1. Step 1: Write the proportion equation
   10,168.04 : 14,040.06 = 8,172.20 : x
2. Step 2: Convert to fraction form
   10,168.04/14,040.06 = 8,172.20/x
3. Step 3: Cross multiply
   10,168.04x = 14,040.06 × 8,172.20
4. Step 4: Simplify right side
   10,168.04x = 114,738,178.33
5. Step 5: Solve for x
   x = 114,738,178.33/10,168.04
6. Step 6: Final answer
   x = 11,284.20