Finding the Fourth Proportional to 1,146.39, 1,581.92 and 674.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.39 : 1,581.92 = 674.30 : x
2. Step 2: Convert to fraction form
   1,146.39/1,581.92 = 674.30/x
3. Step 3: Cross multiply
   1,146.39x = 1,581.92 × 674.30
4. Step 4: Simplify right side
   1,146.39x = 1,066,677.37
5. Step 5: Solve for x
   x = 1,066,677.37/1,146.39
6. Step 6: Final answer
   x = 930.47