Finding the Fourth Proportional to 12,162.47, 18,122.79 and 10,836.03

Step by Step Solution

1. Step 1: Write the proportion equation
   12,162.47 : 18,122.79 = 10,836.03 : x
2. Step 2: Convert to fraction form
   12,162.47/18,122.79 = 10,836.03/x
3. Step 3: Cross multiply
   12,162.47x = 18,122.79 × 10,836.03
4. Step 4: Simplify right side
   12,162.47x = 196,379,096.12
5. Step 5: Solve for x
   x = 196,379,096.12/12,162.47
6. Step 6: Final answer
   x = 16,146.32