Finding the Fourth Proportional to 1,123.67, 1,550.61 and 626.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.67 : 1,550.61 = 626.33 : x
2. Step 2: Convert to fraction form
   1,123.67/1,550.61 = 626.33/x
3. Step 3: Cross multiply
   1,123.67x = 1,550.61 × 626.33
4. Step 4: Simplify right side
   1,123.67x = 971,193.56
5. Step 5: Solve for x
   x = 971,193.56/1,123.67
6. Step 6: Final answer
   x = 864.30