Finding the Fourth Proportional to 16,222.91, 24,290.39 and 8,415.32

Step by Step Solution

1. Step 1: Write the proportion equation
   16,222.91 : 24,290.39 = 8,415.32 : x
2. Step 2: Convert to fraction form
   16,222.91/24,290.39 = 8,415.32/x
3. Step 3: Cross multiply
   16,222.91x = 24,290.39 × 8,415.32
4. Step 4: Simplify right side
   16,222.91x = 204,411,384.51
5. Step 5: Solve for x
   x = 204,411,384.51/16,222.91
6. Step 6: Final answer
   x = 12,600.17