Finding the Fourth Proportional to 1,146.28, 1,582.02 and 680.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.28 : 1,582.02 = 680.56 : x
2. Step 2: Convert to fraction form
   1,146.28/1,582.02 = 680.56/x
3. Step 3: Cross multiply
   1,146.28x = 1,582.02 × 680.56
4. Step 4: Simplify right side
   1,146.28x = 1,076,659.53
5. Step 5: Solve for x
   x = 1,076,659.53/1,146.28
6. Step 6: Final answer
   x = 939.26