Finding the Fourth Proportional to 2,843.71, 3,922.86 and 1,899.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,843.71 : 3,922.86 = 1,899.20 : x
2. Step 2: Convert to fraction form
   2,843.71/3,922.86 = 1,899.20/x
3. Step 3: Cross multiply
   2,843.71x = 3,922.86 × 1,899.20
4. Step 4: Simplify right side
   2,843.71x = 7,450,274.55
5. Step 5: Solve for x
   x = 7,450,274.55/2,843.71
6. Step 6: Final answer
   x = 2,619.92