Finding the Fourth Proportional to 16,128.86, 24,171.41 and 11,984.49

Step by Step Solution

1. Step 1: Write the proportion equation
   16,128.86 : 24,171.41 = 11,984.49 : x
2. Step 2: Convert to fraction form
   16,128.86/24,171.41 = 11,984.49/x
3. Step 3: Cross multiply
   16,128.86x = 24,171.41 × 11,984.49
4. Step 4: Simplify right side
   16,128.86x = 289,682,051.39
5. Step 5: Solve for x
   x = 289,682,051.39/16,128.86
6. Step 6: Final answer
   x = 17,960.48