Finding the Fourth Proportional to 2,580.10, 3,870.42 and 1,119.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,580.10 : 3,870.42 = 1,119.40 : x
2. Step 2: Convert to fraction form
   2,580.10/3,870.42 = 1,119.40/x
3. Step 3: Cross multiply
   2,580.10x = 3,870.42 × 1,119.40
4. Step 4: Simplify right side
   2,580.10x = 4,332,548.15
5. Step 5: Solve for x
   x = 4,332,548.15/2,580.10
6. Step 6: Final answer
   x = 1,679.22