Finding the Fourth Proportional to 1,123.72, 1,550.87 and 626.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.72 : 1,550.87 = 626.41 : x
2. Step 2: Convert to fraction form
   1,123.72/1,550.87 = 626.41/x
3. Step 3: Cross multiply
   1,123.72x = 1,550.87 × 626.41
4. Step 4: Simplify right side
   1,123.72x = 971,481.63
5. Step 5: Solve for x
   x = 971,481.63/1,123.72
6. Step 6: Final answer
   x = 864.52