Finding the Fourth Proportional to 1,123.87, 1,550.97 and 681.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.87 : 1,550.97 = 681.67 : x
2. Step 2: Convert to fraction form
   1,123.87/1,550.97 = 681.67/x
3. Step 3: Cross multiply
   1,123.87x = 1,550.97 × 681.67
4. Step 4: Simplify right side
   1,123.87x = 1,057,249.72
5. Step 5: Solve for x
   x = 1,057,249.72/1,123.87
6. Step 6: Final answer
   x = 940.72