Finding the Fourth Proportional to 16,172.78, 22,315.78 and 9,364.38

Step by Step Solution

1. Step 1: Write the proportion equation
   16,172.78 : 22,315.78 = 9,364.38 : x
2. Step 2: Convert to fraction form
   16,172.78/22,315.78 = 9,364.38/x
3. Step 3: Cross multiply
   16,172.78x = 22,315.78 × 9,364.38
4. Step 4: Simplify right side
   16,172.78x = 208,973,371.94
5. Step 5: Solve for x
   x = 208,973,371.94/16,172.78
6. Step 6: Final answer
   x = 12,921.31