Finding the Fourth Proportional to 13,151.82, 19,732.33 and 8,215.68

Step by Step Solution

1. Step 1: Write the proportion equation
   13,151.82 : 19,732.33 = 8,215.68 : x
2. Step 2: Convert to fraction form
   13,151.82/19,732.33 = 8,215.68/x
3. Step 3: Cross multiply
   13,151.82x = 19,732.33 × 8,215.68
4. Step 4: Simplify right side
   13,151.82x = 162,114,508.93
5. Step 5: Solve for x
   x = 162,114,508.93/13,151.82
6. Step 6: Final answer
   x = 12,326.39