Finding the Fourth Proportional to 1,123.95, 1,550.90 and 626.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.95 : 1,550.90 = 626.53 : x
2. Step 2: Convert to fraction form
   1,123.95/1,550.90 = 626.53/x
3. Step 3: Cross multiply
   1,123.95x = 1,550.90 × 626.53
4. Step 4: Simplify right side
   1,123.95x = 971,674.49
5. Step 5: Solve for x
   x = 971,674.49/1,123.95
6. Step 6: Final answer
   x = 864.52