Finding the Fourth Proportional to 2,078.65, 3,120.71 and 1,619.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,078.65 : 3,120.71 = 1,619.38 : x
2. Step 2: Convert to fraction form
   2,078.65/3,120.71 = 1,619.38/x
3. Step 3: Cross multiply
   2,078.65x = 3,120.71 × 1,619.38
4. Step 4: Simplify right side
   2,078.65x = 5,053,615.36
5. Step 5: Solve for x
   x = 5,053,615.36/2,078.65
6. Step 6: Final answer
   x = 2,431.20