Finding the Fourth Proportional to 16,287.09, 22,456.49 and 13,764.75

Step by Step Solution

1. Step 1: Write the proportion equation
   16,287.09 : 22,456.49 = 13,764.75 : x
2. Step 2: Convert to fraction form
   16,287.09/22,456.49 = 13,764.75/x
3. Step 3: Cross multiply
   16,287.09x = 22,456.49 × 13,764.75
4. Step 4: Simplify right side
   16,287.09x = 309,107,901.90
5. Step 5: Solve for x
   x = 309,107,901.90/16,287.09
6. Step 6: Final answer
   x = 18,978.71