Finding the Fourth Proportional to 3,981.21, 5,494.83 and 2,636.83

Step by Step Solution

1. Step 1: Write the proportion equation
   3,981.21 : 5,494.83 = 2,636.83 : x
2. Step 2: Convert to fraction form
   3,981.21/5,494.83 = 2,636.83/x
3. Step 3: Cross multiply
   3,981.21x = 5,494.83 × 2,636.83
4. Step 4: Simplify right side
   3,981.21x = 14,488,929.57
5. Step 5: Solve for x
   x = 14,488,929.57/3,981.21
6. Step 6: Final answer
   x = 3,639.33