Finding the Fourth Proportional to 16,218.82, 22,316.98 and 12,440.47

Step by Step Solution

1. Step 1: Write the proportion equation
   16,218.82 : 22,316.98 = 12,440.47 : x
2. Step 2: Convert to fraction form
   16,218.82/22,316.98 = 12,440.47/x
3. Step 3: Cross multiply
   16,218.82x = 22,316.98 × 12,440.47
4. Step 4: Simplify right side
   16,218.82x = 277,633,720.18
5. Step 5: Solve for x
   x = 277,633,720.18/16,218.82
6. Step 6: Final answer
   x = 17,118.00