Finding the Fourth Proportional to 11,015.32, 15,222.99 and 9,022.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,015.32 : 15,222.99 = 9,022.72 : x
2. Step 2: Convert to fraction form
   11,015.32/15,222.99 = 9,022.72/x
3. Step 3: Cross multiply
   11,015.32x = 15,222.99 × 9,022.72
4. Step 4: Simplify right side
   11,015.32x = 137,352,776.33
5. Step 5: Solve for x
   x = 137,352,776.33/11,015.32
6. Step 6: Final answer
   x = 12,469.25