Finding the Fourth Proportional to 16,219.42, 22,382.76 and 9,145.78

Step by Step Solution

1. Step 1: Write the proportion equation
   16,219.42 : 22,382.76 = 9,145.78 : x
2. Step 2: Convert to fraction form
   16,219.42/22,382.76 = 9,145.78/x
3. Step 3: Cross multiply
   16,219.42x = 22,382.76 × 9,145.78
4. Step 4: Simplify right side
   16,219.42x = 204,707,798.75
5. Step 5: Solve for x
   x = 204,707,798.75/16,219.42
6. Step 6: Final answer
   x = 12,621.15