Finding the Fourth Proportional to 16,431.78, 22,674.57 and 9,356.82

Step by Step Solution

1. Step 1: Write the proportion equation
   16,431.78 : 22,674.57 = 9,356.82 : x
2. Step 2: Convert to fraction form
   16,431.78/22,674.57 = 9,356.82/x
3. Step 3: Cross multiply
   16,431.78x = 22,674.57 × 9,356.82
4. Step 4: Simplify right side
   16,431.78x = 212,161,870.07
5. Step 5: Solve for x
   x = 212,161,870.07/16,431.78
6. Step 6: Final answer
   x = 12,911.68