Finding the Fourth Proportional to 1,145.37, 1,580.52 and 673.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.37 : 1,580.52 = 673.58 : x
2. Step 2: Convert to fraction form
   1,145.37/1,580.52 = 673.58/x
3. Step 3: Cross multiply
   1,145.37x = 1,580.52 × 673.58
4. Step 4: Simplify right side
   1,145.37x = 1,064,613.14
5. Step 5: Solve for x
   x = 1,064,613.14/1,145.37
6. Step 6: Final answer
   x = 929.49