Finding the Fourth Proportional to 1,123.85, 1,550.81 and 626.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.85 : 1,550.81 = 626.48 : x
2. Step 2: Convert to fraction form
   1,123.85/1,550.81 = 626.48/x
3. Step 3: Cross multiply
   1,123.85x = 1,550.81 × 626.48
4. Step 4: Simplify right side
   1,123.85x = 971,544.44
5. Step 5: Solve for x
   x = 971,544.44/1,123.85
6. Step 6: Final answer
   x = 864.48