Finding the Fourth Proportional to 8,401.60, 12,603.20 and 3,721.04

Step by Step Solution

1. Step 1: Write the proportion equation
   8,401.60 : 12,603.20 = 3,721.04 : x
2. Step 2: Convert to fraction form
   8,401.60/12,603.20 = 3,721.04/x
3. Step 3: Cross multiply
   8,401.60x = 12,603.20 × 3,721.04
4. Step 4: Simplify right side
   8,401.60x = 46,897,011.33
5. Step 5: Solve for x
   x = 46,897,011.33/8,401.60
6. Step 6: Final answer
   x = 5,581.91