Finding the Fourth Proportional to 22,260.72, 30,719.79 and 12,189.16

Step by Step Solution

1. Step 1: Write the proportion equation
   22,260.72 : 30,719.79 = 12,189.16 : x
2. Step 2: Convert to fraction form
   22,260.72/30,719.79 = 12,189.16/x
3. Step 3: Cross multiply
   22,260.72x = 30,719.79 × 12,189.16
4. Step 4: Simplify right side
   22,260.72x = 374,448,435.48
5. Step 5: Solve for x
   x = 374,448,435.48/22,260.72
6. Step 6: Final answer
   x = 16,821.04