Finding the Fourth Proportional to 1,123.39, 1,550.43 and 681.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.39 : 1,550.43 = 681.35 : x
2. Step 2: Convert to fraction form
   1,123.39/1,550.43 = 681.35/x
3. Step 3: Cross multiply
   1,123.39x = 1,550.43 × 681.35
4. Step 4: Simplify right side
   1,123.39x = 1,056,385.48
5. Step 5: Solve for x
   x = 1,056,385.48/1,123.39
6. Step 6: Final answer
   x = 940.36