Finding the Fourth Proportional to 22,359.79, 30,856.52 and 12,288.25

Step by Step Solution

1. Step 1: Write the proportion equation
   22,359.79 : 30,856.52 = 12,288.25 : x
2. Step 2: Convert to fraction form
   22,359.79/30,856.52 = 12,288.25/x
3. Step 3: Cross multiply
   22,359.79x = 30,856.52 × 12,288.25
4. Step 4: Simplify right side
   22,359.79x = 379,172,631.89
5. Step 5: Solve for x
   x = 379,172,631.89/22,359.79
6. Step 6: Final answer
   x = 16,957.79