Finding the Fourth Proportional to 2,076.40, 3,128.84 and 1,719.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,076.40 : 3,128.84 = 1,719.16 : x
2. Step 2: Convert to fraction form
   2,076.40/3,128.84 = 1,719.16/x
3. Step 3: Cross multiply
   2,076.40x = 3,128.84 × 1,719.16
4. Step 4: Simplify right side
   2,076.40x = 5,378,976.57
5. Step 5: Solve for x
   x = 5,378,976.57/2,076.40
6. Step 6: Final answer
   x = 2,590.53