Finding the Fourth Proportional to 1,145.32, 1,580.56 and 673.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.32 : 1,580.56 = 673.10 : x
2. Step 2: Convert to fraction form
   1,145.32/1,580.56 = 673.10/x
3. Step 3: Cross multiply
   1,145.32x = 1,580.56 × 673.10
4. Step 4: Simplify right side
   1,145.32x = 1,063,874.94
5. Step 5: Solve for x
   x = 1,063,874.94/1,145.32
6. Step 6: Final answer
   x = 928.89