Finding the Fourth Proportional to 2,619.39, 3,922.16 and 1,383.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.39 : 3,922.16 = 1,383.05 : x
2. Step 2: Convert to fraction form
   2,619.39/3,922.16 = 1,383.05/x
3. Step 3: Cross multiply
   2,619.39x = 3,922.16 × 1,383.05
4. Step 4: Simplify right side
   2,619.39x = 5,424,546.28
5. Step 5: Solve for x
   x = 5,424,546.28/2,619.39
6. Step 6: Final answer
   x = 2,070.92