Finding the Fourth Proportional to 361.38, 498.69 and 212.10

Step by Step Solution

1. Step 1: Write the proportion equation
   361.38 : 498.69 = 212.10 : x
2. Step 2: Convert to fraction form
   361.38/498.69 = 212.10/x
3. Step 3: Cross multiply
   361.38x = 498.69 × 212.10
4. Step 4: Simplify right side
   361.38x = 105,772.15
5. Step 5: Solve for x
   x = 105,772.15/361.38
6. Step 6: Final answer
   x = 292.69