Finding the Fourth Proportional to 16,871.86, 23,282.72 and 9,318.03

Step by Step Solution

1. Step 1: Write the proportion equation
   16,871.86 : 23,282.72 = 9,318.03 : x
2. Step 2: Convert to fraction form
   16,871.86/23,282.72 = 9,318.03/x
3. Step 3: Cross multiply
   16,871.86x = 23,282.72 × 9,318.03
4. Step 4: Simplify right side
   16,871.86x = 216,949,001.94
5. Step 5: Solve for x
   x = 216,949,001.94/16,871.86
6. Step 6: Final answer
   x = 12,858.63