Finding the Fourth Proportional to 1,145.82, 1,580.86 and 673.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.82 : 1,580.86 = 673.56 : x
2. Step 2: Convert to fraction form
   1,145.82/1,580.86 = 673.56/x
3. Step 3: Cross multiply
   1,145.82x = 1,580.86 × 673.56
4. Step 4: Simplify right side
   1,145.82x = 1,064,805.75
5. Step 5: Solve for x
   x = 1,064,805.75/1,145.82
6. Step 6: Final answer
   x = 929.30