Finding the Fourth Proportional to 15,993.24, 22,070.71 and 8,920.12

Step by Step Solution

1. Step 1: Write the proportion equation
   15,993.24 : 22,070.71 = 8,920.12 : x
2. Step 2: Convert to fraction form
   15,993.24/22,070.71 = 8,920.12/x
3. Step 3: Cross multiply
   15,993.24x = 22,070.71 × 8,920.12
4. Step 4: Simplify right side
   15,993.24x = 196,873,381.69
5. Step 5: Solve for x
   x = 196,873,381.69/15,993.24
6. Step 6: Final answer
   x = 12,309.79