Finding the Fourth Proportional to 2,456.64, 3,390.72 and 1,671

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.64 : 3,390.72 = 1,671 : x
2. Step 2: Convert to fraction form
   2,456.64/3,390.72 = 1,671/x
3. Step 3: Cross multiply
   2,456.64x = 3,390.72 × 1,671
4. Step 4: Simplify right side
   2,456.64x = 5,665,893.12
5. Step 5: Solve for x
   x = 5,665,893.12/2,456.64
6. Step 6: Final answer
   x = 2,306.36