Finding the Fourth Proportional to 15,293.32, 21,105.78 and 8,922.28

Step by Step Solution

1. Step 1: Write the proportion equation
   15,293.32 : 21,105.78 = 8,922.28 : x
2. Step 2: Convert to fraction form
   15,293.32/21,105.78 = 8,922.28/x
3. Step 3: Cross multiply
   15,293.32x = 21,105.78 × 8,922.28
4. Step 4: Simplify right side
   15,293.32x = 188,311,678.78
5. Step 5: Solve for x
   x = 188,311,678.78/15,293.32
6. Step 6: Final answer
   x = 12,313.33