Finding the Fourth Proportional to 1,123.39, 1,685.49 and 630.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,123.39 : 1,685.49 = 630.37 : x
2. Step 2: Convert to fraction form
   1,123.39/1,685.49 = 630.37/x
3. Step 3: Cross multiply
   1,123.39x = 1,685.49 × 630.37
4. Step 4: Simplify right side
   1,123.39x = 1,062,482.33
5. Step 5: Solve for x
   x = 1,062,482.33/1,123.39
6. Step 6: Final answer
   x = 945.78