Finding the Fourth Proportional to 16,220.45, 22,384.55 and 9,145.51

Step by Step Solution

1. Step 1: Write the proportion equation
   16,220.45 : 22,384.55 = 9,145.51 : x
2. Step 2: Convert to fraction form
   16,220.45/22,384.55 = 9,145.51/x
3. Step 3: Cross multiply
   16,220.45x = 22,384.55 × 9,145.51
4. Step 4: Simplify right side
   16,220.45x = 204,718,092.77
5. Step 5: Solve for x
   x = 204,718,092.77/16,220.45
6. Step 6: Final answer
   x = 12,620.99