Finding the Fourth Proportional to 16,531.82, 22,813.59 and 9,361.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,531.82 : 22,813.59 = 9,361.20 : x
2. Step 2: Convert to fraction form
   16,531.82/22,813.59 = 9,361.20/x
3. Step 3: Cross multiply
   16,531.82x = 22,813.59 × 9,361.20
4. Step 4: Simplify right side
   16,531.82x = 213,562,578.71
5. Step 5: Solve for x
   x = 213,562,578.71/16,531.82
6. Step 6: Final answer
   x = 12,918.28