Finding the Fourth Proportional to 3,872.91, 5,809.83 and 1,408.89

Step by Step Solution

1. Step 1: Write the proportion equation
   3,872.91 : 5,809.83 = 1,408.89 : x
2. Step 2: Convert to fraction form
   3,872.91/5,809.83 = 1,408.89/x
3. Step 3: Cross multiply
   3,872.91x = 5,809.83 × 1,408.89
4. Step 4: Simplify right side
   3,872.91x = 8,185,411.39
5. Step 5: Solve for x
   x = 8,185,411.39/3,872.91
6. Step 6: Final answer
   x = 2,113.50