Finding the Fourth Proportional to 1,171.62, 1,617.06 and 674.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.62 : 1,617.06 = 674.58 : x
2. Step 2: Convert to fraction form
   1,171.62/1,617.06 = 674.58/x
3. Step 3: Cross multiply
   1,171.62x = 1,617.06 × 674.58
4. Step 4: Simplify right side
   1,171.62x = 1,090,836.33
5. Step 5: Solve for x
   x = 1,090,836.33/1,171.62
6. Step 6: Final answer
   x = 931.05