Finding the Fourth Proportional to 2,007.79, 3,004.17 and 1,392.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.79 : 3,004.17 = 1,392.70 : x
2. Step 2: Convert to fraction form
   2,007.79/3,004.17 = 1,392.70/x
3. Step 3: Cross multiply
   2,007.79x = 3,004.17 × 1,392.70
4. Step 4: Simplify right side
   2,007.79x = 4,183,907.56
5. Step 5: Solve for x
   x = 4,183,907.56/2,007.79
6. Step 6: Final answer
   x = 2,083.84