Finding the Fourth Proportional to 1,145.07, 1,580.04 and 673.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.07 : 1,580.04 = 673.08 : x
2. Step 2: Convert to fraction form
   1,145.07/1,580.04 = 673.08/x
3. Step 3: Cross multiply
   1,145.07x = 1,580.04 × 673.08
4. Step 4: Simplify right side
   1,145.07x = 1,063,493.32
5. Step 5: Solve for x
   x = 1,063,493.32/1,145.07
6. Step 6: Final answer
   x = 928.76