Finding the Fourth Proportional to 2,870.24, 3,960.24 and 1,821.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,870.24 : 3,960.24 = 1,821.92 : x
2. Step 2: Convert to fraction form
   2,870.24/3,960.24 = 1,821.92/x
3. Step 3: Cross multiply
   2,870.24x = 3,960.24 × 1,821.92
4. Step 4: Simplify right side
   2,870.24x = 7,215,240.46
5. Step 5: Solve for x
   x = 7,215,240.46/2,870.24
6. Step 6: Final answer
   x = 2,513.81