Finding the Fourth Proportional to 498.85, 748.28 and 190.72

Step by Step Solution

1. Step 1: Write the proportion equation
   498.85 : 748.28 = 190.72 : x
2. Step 2: Convert to fraction form
   498.85/748.28 = 190.72/x
3. Step 3: Cross multiply
   498.85x = 748.28 × 190.72
4. Step 4: Simplify right side
   498.85x = 142,713.37
5. Step 5: Solve for x
   x = 142,713.37/498.85
6. Step 6: Final answer
   x = 286.08