Finding the Fourth Proportional to 22,018.72, 30,383.04 and 12,585.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,018.72 : 30,383.04 = 12,585.28 : x
2. Step 2: Convert to fraction form
   22,018.72/30,383.04 = 12,585.28/x
3. Step 3: Cross multiply
   22,018.72x = 30,383.04 × 12,585.28
4. Step 4: Simplify right side
   22,018.72x = 382,379,065.65
5. Step 5: Solve for x
   x = 382,379,065.65/22,018.72
6. Step 6: Final answer
   x = 17,366.09