Finding the Fourth Proportional to 1,146.54, 1,581.90 and 674.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.54 : 1,581.90 = 674.28 : x
2. Step 2: Convert to fraction form
   1,146.54/1,581.90 = 674.28/x
3. Step 3: Cross multiply
   1,146.54x = 1,581.90 × 674.28
4. Step 4: Simplify right side
   1,146.54x = 1,066,643.53
5. Step 5: Solve for x
   x = 1,066,643.53/1,146.54
6. Step 6: Final answer
   x = 930.32