Finding the Fourth Proportional to 2,457.72, 3,391.78 and 1,409.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,457.72 : 3,391.78 = 1,409.56 : x
2. Step 2: Convert to fraction form
   2,457.72/3,391.78 = 1,409.56/x
3. Step 3: Cross multiply
   2,457.72x = 3,391.78 × 1,409.56
4. Step 4: Simplify right side
   2,457.72x = 4,780,917.42
5. Step 5: Solve for x
   x = 4,780,917.42/2,457.72
6. Step 6: Final answer
   x = 1,945.27