Finding the Fourth Proportional to 3,914.37, 5,401.80 and 2,145.96

Step by Step Solution

1. Step 1: Write the proportion equation
   3,914.37 : 5,401.80 = 2,145.96 : x
2. Step 2: Convert to fraction form
   3,914.37/5,401.80 = 2,145.96/x
3. Step 3: Cross multiply
   3,914.37x = 5,401.80 × 2,145.96
4. Step 4: Simplify right side
   3,914.37x = 11,592,046.73
5. Step 5: Solve for x
   x = 11,592,046.73/3,914.37
6. Step 6: Final answer
   x = 2,961.41