Finding the Fourth Proportional to 16,531.62, 22,813.82 and 8,978.03

Step by Step Solution

1. Step 1: Write the proportion equation
   16,531.62 : 22,813.82 = 8,978.03 : x
2. Step 2: Convert to fraction form
   16,531.62/22,813.82 = 8,978.03/x
3. Step 3: Cross multiply
   16,531.62x = 22,813.82 × 8,978.03
4. Step 4: Simplify right side
   16,531.62x = 204,823,160.37
5. Step 5: Solve for x
   x = 204,823,160.37/16,531.62
6. Step 6: Final answer
   x = 12,389.78