Finding the Fourth Proportional to 1,146.28, 1,581.72 and 674.11

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.28 : 1,581.72 = 674.11 : x
2. Step 2: Convert to fraction form
   1,146.28/1,581.72 = 674.11/x
3. Step 3: Cross multiply
   1,146.28x = 1,581.72 × 674.11
4. Step 4: Simplify right side
   1,146.28x = 1,066,253.27
5. Step 5: Solve for x
   x = 1,066,253.27/1,146.28
6. Step 6: Final answer
   x = 930.19