Finding the Fourth Proportional to 8,340.72, 12,507.12 and 3,406.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,340.72 : 12,507.12 = 3,406.32 : x
2. Step 2: Convert to fraction form
   8,340.72/12,507.12 = 3,406.32/x
3. Step 3: Cross multiply
   8,340.72x = 12,507.12 × 3,406.32
4. Step 4: Simplify right side
   8,340.72x = 42,603,253.00
5. Step 5: Solve for x
   x = 42,603,253.00/8,340.72
6. Step 6: Final answer
   x = 5,107.86