Finding the Fourth Proportional to 2,443.20, 3,665.28 and 799.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.20 : 3,665.28 = 799.84 : x
2. Step 2: Convert to fraction form
   2,443.20/3,665.28 = 799.84/x
3. Step 3: Cross multiply
   2,443.20x = 3,665.28 × 799.84
4. Step 4: Simplify right side
   2,443.20x = 2,931,637.56
5. Step 5: Solve for x
   x = 2,931,637.56/2,443.20
6. Step 6: Final answer
   x = 1,199.92