Finding the Fourth Proportional to 498.99, 748.81 and 190.89

Step by Step Solution

1. Step 1: Write the proportion equation
   498.99 : 748.81 = 190.89 : x
2. Step 2: Convert to fraction form
   498.99/748.81 = 190.89/x
3. Step 3: Cross multiply
   498.99x = 748.81 × 190.89
4. Step 4: Simplify right side
   498.99x = 142,940.58
5. Step 5: Solve for x
   x = 142,940.58/498.99
6. Step 6: Final answer
   x = 286.46