Finding the Fourth Proportional to 16,434.69, 24,628.59 and 12,672.24

Step by Step Solution

1. Step 1: Write the proportion equation
   16,434.69 : 24,628.59 = 12,672.24 : x
2. Step 2: Convert to fraction form
   16,434.69/24,628.59 = 12,672.24/x
3. Step 3: Cross multiply
   16,434.69x = 24,628.59 × 12,672.24
4. Step 4: Simplify right side
   16,434.69x = 312,099,403.34
5. Step 5: Solve for x
   x = 312,099,403.34/16,434.69
6. Step 6: Final answer
   x = 18,990.28