Finding the Fourth Proportional to 2,443.31, 3,665.19 and 799.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.31 : 3,665.19 = 799.86 : x
2. Step 2: Convert to fraction form
   2,443.31/3,665.19 = 799.86/x
3. Step 3: Cross multiply
   2,443.31x = 3,665.19 × 799.86
4. Step 4: Simplify right side
   2,443.31x = 2,931,638.87
5. Step 5: Solve for x
   x = 2,931,638.87/2,443.31
6. Step 6: Final answer
   x = 1,199.86