Finding the Fourth Proportional to 1,172.02, 1,616.86 and 674.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,172.02 : 1,616.86 = 674.48 : x
2. Step 2: Convert to fraction form
   1,172.02/1,616.86 = 674.48/x
3. Step 3: Cross multiply
   1,172.02x = 1,616.86 × 674.48
4. Step 4: Simplify right side
   1,172.02x = 1,090,535.52
5. Step 5: Solve for x
   x = 1,090,535.52/1,172.02
6. Step 6: Final answer
   x = 930.48