Finding the Fourth Proportional to 16,388.82, 22,616.57 and 9,315.69

Step by Step Solution

1. Step 1: Write the proportion equation
   16,388.82 : 22,616.57 = 9,315.69 : x
2. Step 2: Convert to fraction form
   16,388.82/22,616.57 = 9,315.69/x
3. Step 3: Cross multiply
   16,388.82x = 22,616.57 × 9,315.69
4. Step 4: Simplify right side
   16,388.82x = 210,688,908.40
5. Step 5: Solve for x
   x = 210,688,908.40/16,388.82
6. Step 6: Final answer
   x = 12,855.65