Finding the Fourth Proportional to 498.76, 748.32 and 190.54

Step by Step Solution

1. Step 1: Write the proportion equation
   498.76 : 748.32 = 190.54 : x
2. Step 2: Convert to fraction form
   498.76/748.32 = 190.54/x
3. Step 3: Cross multiply
   498.76x = 748.32 × 190.54
4. Step 4: Simplify right side
   498.76x = 142,584.89
5. Step 5: Solve for x
   x = 142,584.89/498.76
6. Step 6: Final answer
   x = 285.88