Finding the Fourth Proportional to 22,360.30, 30,856.62 and 12,288.72

Step by Step Solution

1. Step 1: Write the proportion equation
   22,360.30 : 30,856.62 = 12,288.72 : x
2. Step 2: Convert to fraction form
   22,360.30/30,856.62 = 12,288.72/x
3. Step 3: Cross multiply
   22,360.30x = 30,856.62 × 12,288.72
4. Step 4: Simplify right side
   22,360.30x = 379,188,363.33
5. Step 5: Solve for x
   x = 379,188,363.33/22,360.30
6. Step 6: Final answer
   x = 16,958.11