Finding the Fourth Proportional to 15,993.57, 22,069.59 and 8,920.45

Step by Step Solution

1. Step 1: Write the proportion equation
   15,993.57 : 22,069.59 = 8,920.45 : x
2. Step 2: Convert to fraction form
   15,993.57/22,069.59 = 8,920.45/x
3. Step 3: Cross multiply
   15,993.57x = 22,069.59 × 8,920.45
4. Step 4: Simplify right side
   15,993.57x = 196,870,674.12
5. Step 5: Solve for x
   x = 196,870,674.12/15,993.57
6. Step 6: Final answer
   x = 12,309.36