Finding the Fourth Proportional to 16,217.30, 22,381.89 and 9,145.19

Step by Step Solution

1. Step 1: Write the proportion equation
   16,217.30 : 22,381.89 = 9,145.19 : x
2. Step 2: Convert to fraction form
   16,217.30/22,381.89 = 9,145.19/x
3. Step 3: Cross multiply
   16,217.30x = 22,381.89 × 9,145.19
4. Step 4: Simplify right side
   16,217.30x = 204,686,636.61
5. Step 5: Solve for x
   x = 204,686,636.61/16,217.30
6. Step 6: Final answer
   x = 12,621.50