Finding the Fourth Proportional to 12,920.32, 17,826.56 and 8,202.24

Step by Step Solution

1. Step 1: Write the proportion equation
   12,920.32 : 17,826.56 = 8,202.24 : x
2. Step 2: Convert to fraction form
   12,920.32/17,826.56 = 8,202.24/x
3. Step 3: Cross multiply
   12,920.32x = 17,826.56 × 8,202.24
4. Step 4: Simplify right side
   12,920.32x = 146,217,723.49
5. Step 5: Solve for x
   x = 146,217,723.49/12,920.32
6. Step 6: Final answer
   x = 11,316.88