Finding the Fourth Proportional to 22,280.72, 30,745.94 and 12,209.13

Step by Step Solution

1. Step 1: Write the proportion equation
   22,280.72 : 30,745.94 = 12,209.13 : x
2. Step 2: Convert to fraction form
   22,280.72/30,745.94 = 12,209.13/x
3. Step 3: Cross multiply
   22,280.72x = 30,745.94 × 12,209.13
4. Step 4: Simplify right side
   22,280.72x = 375,381,117.39
5. Step 5: Solve for x
   x = 375,381,117.39/22,280.72
6. Step 6: Final answer
   x = 16,847.80