Finding the Fourth Proportional to 1,178.69, 1,626.39 and 681.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178.69 : 1,626.39 = 681.35 : x
2. Step 2: Convert to fraction form
   1,178.69/1,626.39 = 681.35/x
3. Step 3: Cross multiply
   1,178.69x = 1,626.39 × 681.35
4. Step 4: Simplify right side
   1,178.69x = 1,108,132.69
5. Step 5: Solve for x
   x = 1,108,132.69/1,178.69
6. Step 6: Final answer
   x = 940.14