Finding the Fourth Proportional to 2,087, 2,880.42 and 1,259

Step by Step Solution

1. Step 1: Write the proportion equation
   2,087 : 2,880.42 = 1,259 : x
2. Step 2: Convert to fraction form
   2,087/2,880.42 = 1,259/x
3. Step 3: Cross multiply
   2,087x = 2,880.42 × 1,259
4. Step 4: Simplify right side
   2,087x = 3,626,448.78
5. Step 5: Solve for x
   x = 3,626,448.78/2,087
6. Step 6: Final answer
   x = 1,737.64