Finding the Fourth Proportional to 1,085.81, 1,629.24 and 674.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.81 : 1,629.24 = 674.84 : x
2. Step 2: Convert to fraction form
   1,085.81/1,629.24 = 674.84/x
3. Step 3: Cross multiply
   1,085.81x = 1,629.24 × 674.84
4. Step 4: Simplify right side
   1,085.81x = 1,099,476.32
5. Step 5: Solve for x
   x = 1,099,476.32/1,085.81
6. Step 6: Final answer
   x = 1,012.59