Finding the Fourth Proportional to 13,165.30, 18,168.46 and 7,863.18

Step by Step Solution

1. Step 1: Write the proportion equation
   13,165.30 : 18,168.46 = 7,863.18 : x
2. Step 2: Convert to fraction form
   13,165.30/18,168.46 = 7,863.18/x
3. Step 3: Cross multiply
   13,165.30x = 18,168.46 × 7,863.18
4. Step 4: Simplify right side
   13,165.30x = 142,861,780.46
5. Step 5: Solve for x
   x = 142,861,780.46/13,165.30
6. Step 6: Final answer
   x = 10,851.39