Finding the Fourth Proportional to 8,338.09, 12,509.57 and 3,406.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,338.09 : 12,509.57 = 3,406.81 : x
2. Step 2: Convert to fraction form
   8,338.09/12,509.57 = 3,406.81/x
3. Step 3: Cross multiply
   8,338.09x = 12,509.57 × 3,406.81
4. Step 4: Simplify right side
   8,338.09x = 42,617,728.17
5. Step 5: Solve for x
   x = 42,617,728.17/8,338.09
6. Step 6: Final answer
   x = 5,111.21