Finding the Fourth Proportional to 16,288.86, 22,477.39 and 9,215.74

Step by Step Solution

1. Step 1: Write the proportion equation
   16,288.86 : 22,477.39 = 9,215.74 : x
2. Step 2: Convert to fraction form
   16,288.86/22,477.39 = 9,215.74/x
3. Step 3: Cross multiply
   16,288.86x = 22,477.39 × 9,215.74
4. Step 4: Simplify right side
   16,288.86x = 207,145,702.89
5. Step 5: Solve for x
   x = 207,145,702.89/16,288.86
6. Step 6: Final answer
   x = 12,717.02