Finding the Fourth Proportional to 22,335.28, 30,822.12 and 12,399.28

Step by Step Solution

1. Step 1: Write the proportion equation
   22,335.28 : 30,822.12 = 12,399.28 : x
2. Step 2: Convert to fraction form
   22,335.28/30,822.12 = 12,399.28/x
3. Step 3: Cross multiply
   22,335.28x = 30,822.12 × 12,399.28
4. Step 4: Simplify right side
   22,335.28x = 382,172,096.07
5. Step 5: Solve for x
   x = 382,172,096.07/22,335.28
6. Step 6: Final answer
   x = 17,110.69