Finding the Fourth Proportional to 498.15, 742.37 and 488.43

Step by Step Solution

1. Step 1: Write the proportion equation
   498.15 : 742.37 = 488.43 : x
2. Step 2: Convert to fraction form
   498.15/742.37 = 488.43/x
3. Step 3: Cross multiply
   498.15x = 742.37 × 488.43
4. Step 4: Simplify right side
   498.15x = 362,593.34
5. Step 5: Solve for x
   x = 362,593.34/498.15
6. Step 6: Final answer
   x = 727.88