Finding the Fourth Proportional to 8,429.25, 12,643.92 and 2,585.91

Step by Step Solution

1. Step 1: Write the proportion equation
   8,429.25 : 12,643.92 = 2,585.91 : x
2. Step 2: Convert to fraction form
   8,429.25/12,643.92 = 2,585.91/x
3. Step 3: Cross multiply
   8,429.25x = 12,643.92 × 2,585.91
4. Step 4: Simplify right side
   8,429.25x = 32,696,039.17
5. Step 5: Solve for x
   x = 32,696,039.17/8,429.25
6. Step 6: Final answer
   x = 3,878.88