Finding the Fourth Proportional to 1,123.56, 1,550.40 and 658.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.56 : 1,550.40 = 658.08 : x
2. Step 2: Convert to fraction form
   1,123.56/1,550.40 = 658.08/x
3. Step 3: Cross multiply
   1,123.56x = 1,550.40 × 658.08
4. Step 4: Simplify right side
   1,123.56x = 1,020,287.23
5. Step 5: Solve for x
   x = 1,020,287.23/1,123.56
6. Step 6: Final answer
   x = 908.08