Finding the Fourth Proportional to 3,914.14, 5,401.49 and 2,145.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.14 : 5,401.49 = 2,145.71 : x
2. Step 2: Convert to fraction form
   3,914.14/5,401.49 = 2,145.71/x
3. Step 3: Cross multiply
   3,914.14x = 5,401.49 × 2,145.71
4. Step 4: Simplify right side
   3,914.14x = 11,590,003.50
5. Step 5: Solve for x
   x = 11,590,003.50/3,914.14
6. Step 6: Final answer
   x = 2,961.06