Finding the Fourth Proportional to 1,123.14, 1,549.47 and 680.88

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.14 : 1,549.47 = 680.88 : x
2. Step 2: Convert to fraction form
   1,123.14/1,549.47 = 680.88/x
3. Step 3: Cross multiply
   1,123.14x = 1,549.47 × 680.88
4. Step 4: Simplify right side
   1,123.14x = 1,055,003.13
5. Step 5: Solve for x
   x = 1,055,003.13/1,123.14
6. Step 6: Final answer
   x = 939.33