Finding the Fourth Proportional to 3,914.27, 5,401.73 and 2,145.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.27 : 5,401.73 = 2,145.91 : x
2. Step 2: Convert to fraction form
   3,914.27/5,401.73 = 2,145.91/x
3. Step 3: Cross multiply
   3,914.27x = 5,401.73 × 2,145.91
4. Step 4: Simplify right side
   3,914.27x = 11,591,626.42
5. Step 5: Solve for x
   x = 11,591,626.42/3,914.27
6. Step 6: Final answer
   x = 2,961.38