Finding the Fourth Proportional to 1,178.73, 1,626.69 and 681.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178.73 : 1,626.69 = 681.53 : x
2. Step 2: Convert to fraction form
   1,178.73/1,626.69 = 681.53/x
3. Step 3: Cross multiply
   1,178.73x = 1,626.69 × 681.53
4. Step 4: Simplify right side
   1,178.73x = 1,108,629.90
5. Step 5: Solve for x
   x = 1,108,629.90/1,178.73
6. Step 6: Final answer
   x = 940.53