Finding the Fourth Proportional to 1,123.85, 1,550.49 and 681.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.85 : 1,550.49 = 681.59 : x
2. Step 2: Convert to fraction form
   1,123.85/1,550.49 = 681.59/x
3. Step 3: Cross multiply
   1,123.85x = 1,550.49 × 681.59
4. Step 4: Simplify right side
   1,123.85x = 1,056,798.48
5. Step 5: Solve for x
   x = 1,056,798.48/1,123.85
6. Step 6: Final answer
   x = 940.34