Finding the Fourth Proportional to 333.50, 499.94 and 128.06

Step by Step Solution

1. Step 1: Write the proportion equation
   333.50 : 499.94 = 128.06 : x
2. Step 2: Convert to fraction form
   333.50/499.94 = 128.06/x
3. Step 3: Cross multiply
   333.50x = 499.94 × 128.06
4. Step 4: Simplify right side
   333.50x = 64,022.32
5. Step 5: Solve for x
   x = 64,022.32/333.50
6. Step 6: Final answer
   x = 191.97