Finding the Fourth Proportional to 1,172.30, 1,617.76 and 674.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.30 : 1,617.76 = 674.94 : x
2. Step 2: Convert to fraction form
   1,172.30/1,617.76 = 674.94/x
3. Step 3: Cross multiply
   1,172.30x = 1,617.76 × 674.94
4. Step 4: Simplify right side
   1,172.30x = 1,091,890.93
5. Step 5: Solve for x
   x = 1,091,890.93/1,172.30
6. Step 6: Final answer
   x = 931.41