Finding the Fourth Proportional to 1,423.34, 2,133.78 and 682.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.34 : 2,133.78 = 682.56 : x
2. Step 2: Convert to fraction form
   1,423.34/2,133.78 = 682.56/x
3. Step 3: Cross multiply
   1,423.34x = 2,133.78 × 682.56
4. Step 4: Simplify right side
   1,423.34x = 1,456,432.88
5. Step 5: Solve for x
   x = 1,456,432.88/1,423.34
6. Step 6: Final answer
   x = 1,023.25