Finding the Fourth Proportional to 1,123.73, 1,550.63 and 626.35

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.73 : 1,550.63 = 626.35 : x
2. Step 2: Convert to fraction form
   1,123.73/1,550.63 = 626.35/x
3. Step 3: Cross multiply
   1,123.73x = 1,550.63 × 626.35
4. Step 4: Simplify right side
   1,123.73x = 971,242.54
5. Step 5: Solve for x
   x = 971,242.54/1,123.73
6. Step 6: Final answer
   x = 864.31