Finding the Fourth Proportional to 22,359.96, 30,857.40 and 12,288.69

Step by Step Solution

1. Step 1: Write the proportion equation
   22,359.96 : 30,857.40 = 12,288.69 : x
2. Step 2: Convert to fraction form
   22,359.96/30,857.40 = 12,288.69/x
3. Step 3: Cross multiply
   22,359.96x = 30,857.40 × 12,288.69
4. Step 4: Simplify right side
   22,359.96x = 379,197,022.81
5. Step 5: Solve for x
   x = 379,197,022.81/22,359.96
6. Step 6: Final answer
   x = 16,958.75