Finding the Fourth Proportional to 12,200.67, 16,845.62 and 9,644.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,200.67 : 16,845.62 = 9,644.61 : x
2. Step 2: Convert to fraction form
   12,200.67/16,845.62 = 9,644.61/x
3. Step 3: Cross multiply
   12,200.67x = 16,845.62 × 9,644.61
4. Step 4: Simplify right side
   12,200.67x = 162,469,386.89
5. Step 5: Solve for x
   x = 162,469,386.89/12,200.67
6. Step 6: Final answer
   x = 13,316.43