Finding the Fourth Proportional to 2,443.18, 3,665 and 799.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,443.18 : 3,665 = 799.74 : x
2. Step 2: Convert to fraction form
   2,443.18/3,665 = 799.74/x
3. Step 3: Cross multiply
   2,443.18x = 3,665 × 799.74
4. Step 4: Simplify right side
   2,443.18x = 2,931,047.10
5. Step 5: Solve for x
   x = 2,931,047.10/2,443.18
6. Step 6: Final answer
   x = 1,199.69