Finding the Fourth Proportional to 21,822.16, 30,111.30 and 12,260.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,822.16 : 30,111.30 = 12,260.22 : x
2. Step 2: Convert to fraction form
   21,822.16/30,111.30 = 12,260.22/x
3. Step 3: Cross multiply
   21,822.16x = 30,111.30 × 12,260.22
4. Step 4: Simplify right side
   21,822.16x = 369,171,162.49
5. Step 5: Solve for x
   x = 369,171,162.49/21,822.16
6. Step 6: Final answer
   x = 16,917.26