Finding the Fourth Proportional to 1,171.49, 1,616.78 and 674.26

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.49 : 1,616.78 = 674.26 : x
2. Step 2: Convert to fraction form
   1,171.49/1,616.78 = 674.26/x
3. Step 3: Cross multiply
   1,171.49x = 1,616.78 × 674.26
4. Step 4: Simplify right side
   1,171.49x = 1,090,127.73
5. Step 5: Solve for x
   x = 1,090,127.73/1,171.49
6. Step 6: Final answer
   x = 930.55