Finding the Fourth Proportional to 2,149.13, 3,219.61 and 1,801.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,149.13 : 3,219.61 = 1,801.61 : x
2. Step 2: Convert to fraction form
   2,149.13/3,219.61 = 1,801.61/x
3. Step 3: Cross multiply
   2,149.13x = 3,219.61 × 1,801.61
4. Step 4: Simplify right side
   2,149.13x = 5,800,481.57
5. Step 5: Solve for x
   x = 5,800,481.57/2,149.13
6. Step 6: Final answer
   x = 2,698.99