Finding the Fourth Proportional to 8,410.25, 12,615.78 and 3,725.21

Step by Step Solution

1. Step 1: Write the proportion equation
   8,410.25 : 12,615.78 = 3,725.21 : x
2. Step 2: Convert to fraction form
   8,410.25/12,615.78 = 3,725.21/x
3. Step 3: Cross multiply
   8,410.25x = 12,615.78 × 3,725.21
4. Step 4: Simplify right side
   8,410.25x = 46,996,366.73
5. Step 5: Solve for x
   x = 46,996,366.73/8,410.25
6. Step 6: Final answer
   x = 5,587.99