Finding the Fourth Proportional to 22,261.72, 30,721.17 and 12,190.16

Step by Step Solution

1. Step 1: Write the proportion equation
   22,261.72 : 30,721.17 = 12,190.16 : x
2. Step 2: Convert to fraction form
   22,261.72/30,721.17 = 12,190.16/x
3. Step 3: Cross multiply
   22,261.72x = 30,721.17 × 12,190.16
4. Step 4: Simplify right side
   22,261.72x = 374,495,977.69
5. Step 5: Solve for x
   x = 374,495,977.69/22,261.72
6. Step 6: Final answer
   x = 16,822.42