Finding the Fourth Proportional to 2,579.82, 3,869.88 and 1,019.70

Step by Step Solution

1. Step 1: Write the proportion equation
   2,579.82 : 3,869.88 = 1,019.70 : x
2. Step 2: Convert to fraction form
   2,579.82/3,869.88 = 1,019.70/x
3. Step 3: Cross multiply
   2,579.82x = 3,869.88 × 1,019.70
4. Step 4: Simplify right side
   2,579.82x = 3,946,116.64
5. Step 5: Solve for x
   x = 3,946,116.64/2,579.82
6. Step 6: Final answer
   x = 1,529.61