Finding the Fourth Proportional to 16,145.88, 22,280.22 and 9,072.12

Step by Step Solution

1. Step 1: Write the proportion equation
   16,145.88 : 22,280.22 = 9,072.12 : x
2. Step 2: Convert to fraction form
   16,145.88/22,280.22 = 9,072.12/x
3. Step 3: Cross multiply
   16,145.88x = 22,280.22 × 9,072.12
4. Step 4: Simplify right side
   16,145.88x = 202,128,829.47
5. Step 5: Solve for x
   x = 202,128,829.47/16,145.88
6. Step 6: Final answer
   x = 12,518.91