Finding the Fourth Proportional to 1,146.78, 1,582.40 and 674.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.78 : 1,582.40 = 674.62 : x
2. Step 2: Convert to fraction form
   1,146.78/1,582.40 = 674.62/x
3. Step 3: Cross multiply
   1,146.78x = 1,582.40 × 674.62
4. Step 4: Simplify right side
   1,146.78x = 1,067,516.42
5. Step 5: Solve for x
   x = 1,067,516.42/1,146.78
6. Step 6: Final answer
   x = 930.88