Finding the Fourth Proportional to 2,104.70, 3,159.90 and 1,228.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,104.70 : 3,159.90 = 1,228.10 : x
2. Step 2: Convert to fraction form
   2,104.70/3,159.90 = 1,228.10/x
3. Step 3: Cross multiply
   2,104.70x = 3,159.90 × 1,228.10
4. Step 4: Simplify right side
   2,104.70x = 3,880,657.39
5. Step 5: Solve for x
   x = 3,880,657.39/2,104.70
6. Step 6: Final answer
   x = 1,843.81