Finding the Fourth Proportional to 1,171.40, 1,616.52 and 674.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,171.40 : 1,616.52 = 674.12 : x
2. Step 2: Convert to fraction form
   1,171.40/1,616.52 = 674.12/x
3. Step 3: Cross multiply
   1,171.40x = 1,616.52 × 674.12
4. Step 4: Simplify right side
   1,171.40x = 1,089,735.03
5. Step 5: Solve for x
   x = 1,089,735.03/1,171.40
6. Step 6: Final answer
   x = 930.29