Finding the Fourth Proportional to 2,579.36, 3,870.91 and 936.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,579.36 : 3,870.91 = 936.03 : x
2. Step 2: Convert to fraction form
   2,579.36/3,870.91 = 936.03/x
3. Step 3: Cross multiply
   2,579.36x = 3,870.91 × 936.03
4. Step 4: Simplify right side
   2,579.36x = 3,623,303.57
5. Step 5: Solve for x
   x = 3,623,303.57/2,579.36
6. Step 6: Final answer
   x = 1,404.73