Finding the Fourth Proportional to 1,123.91, 1,550.57 and 698.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.91 : 1,550.57 = 698.34 : x
2. Step 2: Convert to fraction form
   1,123.91/1,550.57 = 698.34/x
3. Step 3: Cross multiply
   1,123.91x = 1,550.57 × 698.34
4. Step 4: Simplify right side
   1,123.91x = 1,082,825.05
5. Step 5: Solve for x
   x = 1,082,825.05/1,123.91
6. Step 6: Final answer
   x = 963.44