Finding the Fourth Proportional to 1,146.48, 1,581.88 and 674.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.48 : 1,581.88 = 674.28 : x
2. Step 2: Convert to fraction form
   1,146.48/1,581.88 = 674.28/x
3. Step 3: Cross multiply
   1,146.48x = 1,581.88 × 674.28
4. Step 4: Simplify right side
   1,146.48x = 1,066,630.05
5. Step 5: Solve for x
   x = 1,066,630.05/1,146.48
6. Step 6: Final answer
   x = 930.35