Finding the Fourth Proportional to 3,914.29, 5,401.53 and 2,145.85

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.29 : 5,401.53 = 2,145.85 : x
2. Step 2: Convert to fraction form
   3,914.29/5,401.53 = 2,145.85/x
3. Step 3: Cross multiply
   3,914.29x = 5,401.53 × 2,145.85
4. Step 4: Simplify right side
   3,914.29x = 11,590,873.15
5. Step 5: Solve for x
   x = 11,590,873.15/3,914.29
6. Step 6: Final answer
   x = 2,961.17