Finding the Fourth Proportional to 1,123.93, 1,550.96 and 626.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.93 : 1,550.96 = 626.61 : x
2. Step 2: Convert to fraction form
   1,123.93/1,550.96 = 626.61/x
3. Step 3: Cross multiply
   1,123.93x = 1,550.96 × 626.61
4. Step 4: Simplify right side
   1,123.93x = 971,846.88
5. Step 5: Solve for x
   x = 971,846.88/1,123.93
6. Step 6: Final answer
   x = 864.69