Finding the Fourth Proportional to 1,172.03, 1,617.71 and 674.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.03 : 1,617.71 = 674.72 : x
2. Step 2: Convert to fraction form
   1,172.03/1,617.71 = 674.72/x
3. Step 3: Cross multiply
   1,172.03x = 1,617.71 × 674.72
4. Step 4: Simplify right side
   1,172.03x = 1,091,501.96
5. Step 5: Solve for x
   x = 1,091,501.96/1,172.03
6. Step 6: Final answer
   x = 931.30