Finding the Third Proportional to 353.91 and 549.56

Step by Step Solution

1. Step 1: Write the proportion equation
   353.91 : 549.56 = 549.56 : x
2. Step 2: Convert to fraction form
   353.91/549.56 = 549.56/x
3. Step 3: Cross multiply
   353.91x = 549.56 × 549.56
4. Step 4: Simplify right side
   353.91x = 302,018.94
5. Step 5: Solve for x
   x = 302,018.94/353.91
6. Step 6: Final answer
   x = 853.39