Finding the Fourth Proportional to 1,145.85, 1,581.63 and 673.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.85 : 1,581.63 = 673.82 : x
2. Step 2: Convert to fraction form
   1,145.85/1,581.63 = 673.82/x
3. Step 3: Cross multiply
   1,145.85x = 1,581.63 × 673.82
4. Step 4: Simplify right side
   1,145.85x = 1,065,729.42
5. Step 5: Solve for x
   x = 1,065,729.42/1,145.85
6. Step 6: Final answer
   x = 930.08