Finding the Fourth Proportional to 1,145.72, 1,581.08 and 673.92

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.72 : 1,581.08 = 673.92 : x
2. Step 2: Convert to fraction form
   1,145.72/1,581.08 = 673.92/x
3. Step 3: Cross multiply
   1,145.72x = 1,581.08 × 673.92
4. Step 4: Simplify right side
   1,145.72x = 1,065,521.43
5. Step 5: Solve for x
   x = 1,065,521.43/1,145.72
6. Step 6: Final answer
   x = 930.00