Finding the Fourth Proportional to 16,091.69, 22,207.73 and 10,128.47

Step by Step Solution

1. Step 1: Write the proportion equation
   16,091.69 : 22,207.73 = 10,128.47 : x
2. Step 2: Convert to fraction form
   16,091.69/22,207.73 = 10,128.47/x
3. Step 3: Cross multiply
   16,091.69x = 22,207.73 × 10,128.47
4. Step 4: Simplify right side
   16,091.69x = 224,930,165.39
5. Step 5: Solve for x
   x = 224,930,165.39/16,091.69
6. Step 6: Final answer
   x = 13,978.04