Finding the Fourth Proportional to 1,178.83, 1,626.69 and 681.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,178.83 : 1,626.69 = 681.67 : x
2. Step 2: Convert to fraction form
   1,178.83/1,626.69 = 681.67/x
3. Step 3: Cross multiply
   1,178.83x = 1,626.69 × 681.67
4. Step 4: Simplify right side
   1,178.83x = 1,108,865.77
5. Step 5: Solve for x
   x = 1,108,865.77/1,178.83
6. Step 6: Final answer
   x = 940.65