Finding the Fourth Proportional to 22,285.89, 30,754.89 and 12,215.30

Step by Step Solution

1. Step 1: Write the proportion equation
   22,285.89 : 30,754.89 = 12,215.30 : x
2. Step 2: Convert to fraction form
   22,285.89/30,754.89 = 12,215.30/x
3. Step 3: Cross multiply
   22,285.89x = 30,754.89 × 12,215.30
4. Step 4: Simplify right side
   22,285.89x = 375,680,054.04
5. Step 5: Solve for x
   x = 375,680,054.04/22,285.89
6. Step 6: Final answer
   x = 16,857.31