Finding the Fourth Proportional to 1,123.53, 1,550.17 and 669.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.53 : 1,550.17 = 669.18 : x
2. Step 2: Convert to fraction form
   1,123.53/1,550.17 = 669.18/x
3. Step 3: Cross multiply
   1,123.53x = 1,550.17 × 669.18
4. Step 4: Simplify right side
   1,123.53x = 1,037,342.76
5. Step 5: Solve for x
   x = 1,037,342.76/1,123.53
6. Step 6: Final answer
   x = 923.29