Finding the Fourth Proportional to 16,219.36, 22,382.72 and 9,145.79

Step by Step Solution

1. Step 1: Write the proportion equation
   16,219.36 : 22,382.72 = 9,145.79 : x
2. Step 2: Convert to fraction form
   16,219.36/22,382.72 = 9,145.79/x
3. Step 3: Cross multiply
   16,219.36x = 22,382.72 × 9,145.79
4. Step 4: Simplify right side
   16,219.36x = 204,707,567.70
5. Step 5: Solve for x
   x = 204,707,567.70/16,219.36
6. Step 6: Final answer
   x = 12,621.19