Finding the Fourth Proportional to 1,123.26, 1,550.22 and 681.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.26 : 1,550.22 = 681.15 : x
2. Step 2: Convert to fraction form
   1,123.26/1,550.22 = 681.15/x
3. Step 3: Cross multiply
   1,123.26x = 1,550.22 × 681.15
4. Step 4: Simplify right side
   1,123.26x = 1,055,932.35
5. Step 5: Solve for x
   x = 1,055,932.35/1,123.26
6. Step 6: Final answer
   x = 940.06