Finding the Fourth Proportional to 16,218.71, 22,382.60 and 9,144.98

Step by Step Solution

1. Step 1: Write the proportion equation
   16,218.71 : 22,382.60 = 9,144.98 : x
2. Step 2: Convert to fraction form
   16,218.71/22,382.60 = 9,144.98/x
3. Step 3: Cross multiply
   16,218.71x = 22,382.60 × 9,144.98
4. Step 4: Simplify right side
   16,218.71x = 204,688,558.71
5. Step 5: Solve for x
   x = 204,688,558.71/16,218.71
6. Step 6: Final answer
   x = 12,620.52