Finding the Fourth Proportional to 22,216.50, 30,658.77 and 12,280.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,216.50 : 30,658.77 = 12,280.50 : x
2. Step 2: Convert to fraction form
   22,216.50/30,658.77 = 12,280.50/x
3. Step 3: Cross multiply
   22,216.50x = 30,658.77 × 12,280.50
4. Step 4: Simplify right side
   22,216.50x = 376,505,024.99
5. Step 5: Solve for x
   x = 376,505,024.99/22,216.50
6. Step 6: Final answer
   x = 16,947.09