Finding the Fourth Proportional to 3,914.36, 5,401.76 and 2,145.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.36 : 5,401.76 = 2,145.96 : x
2. Step 2: Convert to fraction form
   3,914.36/5,401.76 = 2,145.96/x
3. Step 3: Cross multiply
   3,914.36x = 5,401.76 × 2,145.96
4. Step 4: Simplify right side
   3,914.36x = 11,591,960.89
5. Step 5: Solve for x
   x = 11,591,960.89/3,914.36
6. Step 6: Final answer
   x = 2,961.39