Finding the Fourth Proportional to 1,178.56, 1,626.71 and 681.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178.56 : 1,626.71 = 681.49 : x
2. Step 2: Convert to fraction form
   1,178.56/1,626.71 = 681.49/x
3. Step 3: Cross multiply
   1,178.56x = 1,626.71 × 681.49
4. Step 4: Simplify right side
   1,178.56x = 1,108,586.60
5. Step 5: Solve for x
   x = 1,108,586.60/1,178.56
6. Step 6: Final answer
   x = 940.63