Finding the Fourth Proportional to 3,914.27, 5,401.78 and 2,145.97

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.27 : 5,401.78 = 2,145.97 : x
2. Step 2: Convert to fraction form
   3,914.27/5,401.78 = 2,145.97/x
3. Step 3: Cross multiply
   3,914.27x = 5,401.78 × 2,145.97
4. Step 4: Simplify right side
   3,914.27x = 11,592,057.83
5. Step 5: Solve for x
   x = 11,592,057.83/3,914.27
6. Step 6: Final answer
   x = 2,961.49