Finding the Fourth Proportional to 2,456.72, 3,388.56 and 1,669.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.72 : 3,388.56 = 1,669.40 : x
2. Step 2: Convert to fraction form
   2,456.72/3,388.56 = 1,669.40/x
3. Step 3: Cross multiply
   2,456.72x = 3,388.56 × 1,669.40
4. Step 4: Simplify right side
   2,456.72x = 5,656,862.06
5. Step 5: Solve for x
   x = 5,656,862.06/2,456.72
6. Step 6: Final answer
   x = 2,302.61