Finding the Fourth Proportional to 8,320.53, 12,477.32 and 3,386.82

Step by Step Solution

1. Step 1: Write the proportion equation
   8,320.53 : 12,477.32 = 3,386.82 : x
2. Step 2: Convert to fraction form
   8,320.53/12,477.32 = 3,386.82/x
3. Step 3: Cross multiply
   8,320.53x = 12,477.32 × 3,386.82
4. Step 4: Simplify right side
   8,320.53x = 42,258,436.92
5. Step 5: Solve for x
   x = 42,258,436.92/8,320.53
6. Step 6: Final answer
   x = 5,078.82