Finding the Fourth Proportional to 13,168.15, 18,168.38 and 7,861.03

Step by Step Solution

1. Step 1: Write the proportion equation
   13,168.15 : 18,168.38 = 7,861.03 : x
2. Step 2: Convert to fraction form
   13,168.15/18,168.38 = 7,861.03/x
3. Step 3: Cross multiply
   13,168.15x = 18,168.38 × 7,861.03
4. Step 4: Simplify right side
   13,168.15x = 142,822,180.23
5. Step 5: Solve for x
   x = 142,822,180.23/13,168.15
6. Step 6: Final answer
   x = 10,846.03