Finding the Fourth Proportional to 1,123.59, 1,550.63 and 626.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.59 : 1,550.63 = 626.23 : x
2. Step 2: Convert to fraction form
   1,123.59/1,550.63 = 626.23/x
3. Step 3: Cross multiply
   1,123.59x = 1,550.63 × 626.23
4. Step 4: Simplify right side
   1,123.59x = 971,040.14
5. Step 5: Solve for x
   x = 971,040.14/1,123.59
6. Step 6: Final answer
   x = 864.23