Finding the Fourth Proportional to 2,456.72, 3,390.48 and 1,409.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.72 : 3,390.48 = 1,409.12 : x
2. Step 2: Convert to fraction form
   2,456.72/3,390.48 = 1,409.12/x
3. Step 3: Cross multiply
   2,456.72x = 3,390.48 × 1,409.12
4. Step 4: Simplify right side
   2,456.72x = 4,777,593.18
5. Step 5: Solve for x
   x = 4,777,593.18/2,456.72
6. Step 6: Final answer
   x = 1,944.70