Finding the Fourth Proportional to 22,128, 30,538.56 and 12,193.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,128 : 30,538.56 = 12,193.92 : x
2. Step 2: Convert to fraction form
   22,128/30,538.56 = 12,193.92/x
3. Step 3: Cross multiply
   22,128x = 30,538.56 × 12,193.92
4. Step 4: Simplify right side
   22,128x = 372,384,757.56
5. Step 5: Solve for x
   x = 372,384,757.56/22,128
6. Step 6: Final answer
   x = 16,828.67