Finding the Fourth Proportional to 748.89, 1,123.74 and 488.82

Step by Step Solution

1. Step 1: Write the proportion equation
   748.89 : 1,123.74 = 488.82 : x
2. Step 2: Convert to fraction form
   748.89/1,123.74 = 488.82/x
3. Step 3: Cross multiply
   748.89x = 1,123.74 × 488.82
4. Step 4: Simplify right side
   748.89x = 549,306.59
5. Step 5: Solve for x
   x = 549,306.59/748.89
6. Step 6: Final answer
   x = 733.49