Finding the Fourth Proportional to 3,914.01, 5,401.35 and 2,145.69

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.01 : 5,401.35 = 2,145.69 : x
2. Step 2: Convert to fraction form
   3,914.01/5,401.35 = 2,145.69/x
3. Step 3: Cross multiply
   3,914.01x = 5,401.35 × 2,145.69
4. Step 4: Simplify right side
   3,914.01x = 11,589,622.68
5. Step 5: Solve for x
   x = 11,589,622.68/3,914.01
6. Step 6: Final answer
   x = 2,961.06