Finding the Fourth Proportional to 3,921.14, 5,411.94 and 2,429.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,921.14 : 5,411.94 = 2,429.72 : x
2. Step 2: Convert to fraction form
   3,921.14/5,411.94 = 2,429.72/x
3. Step 3: Cross multiply
   3,921.14x = 5,411.94 × 2,429.72
4. Step 4: Simplify right side
   3,921.14x = 13,149,498.86
5. Step 5: Solve for x
   x = 13,149,498.86/3,921.14
6. Step 6: Final answer
   x = 3,353.49