Finding the Fourth Proportional to 2,185.49, 3,280.58 and 1,212.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.49 : 3,280.58 = 1,212.41 : x
2. Step 2: Convert to fraction form
   2,185.49/3,280.58 = 1,212.41/x
3. Step 3: Cross multiply
   2,185.49x = 3,280.58 × 1,212.41
4. Step 4: Simplify right side
   2,185.49x = 3,977,408.00
5. Step 5: Solve for x
   x = 3,977,408.00/2,185.49
6. Step 6: Final answer
   x = 1,819.92