Finding the Fourth Proportional to 498.31, 747.49 and 190.10

Step by Step Solution

1. Step 1: Write the proportion equation
   498.31 : 747.49 = 190.10 : x
2. Step 2: Convert to fraction form
   498.31/747.49 = 190.10/x
3. Step 3: Cross multiply
   498.31x = 747.49 × 190.10
4. Step 4: Simplify right side
   498.31x = 142,099.24
5. Step 5: Solve for x
   x = 142,099.24/498.31
6. Step 6: Final answer
   x = 285.16