Finding the Fourth Proportional to 333.31, 499.91 and 127.98

Step by Step Solution

1. Step 1: Write the proportion equation
   333.31 : 499.91 = 127.98 : x
2. Step 2: Convert to fraction form
   333.31/499.91 = 127.98/x
3. Step 3: Cross multiply
   333.31x = 499.91 × 127.98
4. Step 4: Simplify right side
   333.31x = 63,978.48
5. Step 5: Solve for x
   x = 63,978.48/333.31
6. Step 6: Final answer
   x = 191.95