Finding the Fourth Proportional to 16,201.69, 22,359.46 and 9,128.13

Step by Step Solution

1. Step 1: Write the proportion equation
   16,201.69 : 22,359.46 = 9,128.13 : x
2. Step 2: Convert to fraction form
   16,201.69/22,359.46 = 9,128.13/x
3. Step 3: Cross multiply
   16,201.69x = 22,359.46 × 9,128.13
4. Step 4: Simplify right side
   16,201.69x = 204,099,968.06
5. Step 5: Solve for x
   x = 204,099,968.06/16,201.69
6. Step 6: Final answer
   x = 12,597.45