Finding the Fourth Proportional to 1,178.91, 1,626.93 and 681.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178.91 : 1,626.93 = 681.71 : x
2. Step 2: Convert to fraction form
   1,178.91/1,626.93 = 681.71/x
3. Step 3: Cross multiply
   1,178.91x = 1,626.93 × 681.71
4. Step 4: Simplify right side
   1,178.91x = 1,109,086.32
5. Step 5: Solve for x
   x = 1,109,086.32/1,178.91
6. Step 6: Final answer
   x = 940.77