Finding the Fourth Proportional to 8,429.94, 12,643.79 and 2,506.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.94 : 12,643.79 = 2,506.71 : x
2. Step 2: Convert to fraction form
   8,429.94/12,643.79 = 2,506.71/x
3. Step 3: Cross multiply
   8,429.94x = 12,643.79 × 2,506.71
4. Step 4: Simplify right side
   8,429.94x = 31,694,302.30
5. Step 5: Solve for x
   x = 31,694,302.30/8,429.94
6. Step 6: Final answer
   x = 3,759.73