Finding the Fourth Proportional to 16,292.72, 22,478.72 and 9,121.58

Step by Step Solution

1. Step 1: Write the proportion equation
   16,292.72 : 22,478.72 = 9,121.58 : x
2. Step 2: Convert to fraction form
   16,292.72/22,478.72 = 9,121.58/x
3. Step 3: Cross multiply
   16,292.72x = 22,478.72 × 9,121.58
4. Step 4: Simplify right side
   16,292.72x = 205,041,420.38
5. Step 5: Solve for x
   x = 205,041,420.38/16,292.72
6. Step 6: Final answer
   x = 12,584.85