Finding the Fourth Proportional to 2,304.86, 3,180.74 and 1,256.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,304.86 : 3,180.74 = 1,256.90 : x
2. Step 2: Convert to fraction form
   2,304.86/3,180.74 = 1,256.90/x
3. Step 3: Cross multiply
   2,304.86x = 3,180.74 × 1,256.90
4. Step 4: Simplify right side
   2,304.86x = 3,997,849.92
5. Step 5: Solve for x
   x = 3,997,849.92/2,304.86
6. Step 6: Final answer
   x = 1,734.53