Finding the Fourth Proportional to 3,458.27, 4,770.69 and 2,278.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,458.27 : 4,770.69 = 2,278.91 : x
2. Step 2: Convert to fraction form
   3,458.27/4,770.69 = 2,278.91/x
3. Step 3: Cross multiply
   3,458.27x = 4,770.69 × 2,278.91
4. Step 4: Simplify right side
   3,458.27x = 10,871,973.15
5. Step 5: Solve for x
   x = 10,871,973.15/3,458.27
6. Step 6: Final answer
   x = 3,143.76