Finding the Fourth Proportional to 16,218.59, 22,382.69 and 9,145.46

Step by Step Solution

1. Step 1: Write the proportion equation
   16,218.59 : 22,382.69 = 9,145.46 : x
2. Step 2: Convert to fraction form
   16,218.59/22,382.69 = 9,145.46/x
3. Step 3: Cross multiply
   16,218.59x = 22,382.69 × 9,145.46
4. Step 4: Simplify right side
   16,218.59x = 204,699,838.45
5. Step 5: Solve for x
   x = 204,699,838.45/16,218.59
6. Step 6: Final answer
   x = 12,621.31