Finding the Fourth Proportional to 2,399.76, 3,311.43 and 1,770.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.76 : 3,311.43 = 1,770.63 : x
2. Step 2: Convert to fraction form
   2,399.76/3,311.43 = 1,770.63/x
3. Step 3: Cross multiply
   2,399.76x = 3,311.43 × 1,770.63
4. Step 4: Simplify right side
   2,399.76x = 5,863,317.30
5. Step 5: Solve for x
   x = 5,863,317.30/2,399.76
6. Step 6: Final answer
   x = 2,443.29