Finding the Fourth Proportional to 8,401.99, 12,604.15 and 3,721.63

Step by Step Solution

1. Step 1: Write the proportion equation
   8,401.99 : 12,604.15 = 3,721.63 : x
2. Step 2: Convert to fraction form
   8,401.99/12,604.15 = 3,721.63/x
3. Step 3: Cross multiply
   8,401.99x = 12,604.15 × 3,721.63
4. Step 4: Simplify right side
   8,401.99x = 46,907,982.76
5. Step 5: Solve for x
   x = 46,907,982.76/8,401.99
6. Step 6: Final answer
   x = 5,582.96