Finding the Fourth Proportional to 8,313.78, 12,456.06 and 7,409.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,313.78 : 12,456.06 = 7,409.82 : x
2. Step 2: Convert to fraction form
   8,313.78/12,456.06 = 7,409.82/x
3. Step 3: Cross multiply
   8,313.78x = 12,456.06 × 7,409.82
4. Step 4: Simplify right side
   8,313.78x = 92,297,162.51
5. Step 5: Solve for x
   x = 92,297,162.51/8,313.78
6. Step 6: Final answer
   x = 11,101.71