Finding the Third Proportional to 543.50 and 606.50

Step by Step Solution

1. Step 1: Write the proportion equation
   543.50 : 606.50 = 606.50 : x
2. Step 2: Convert to fraction form
   543.50/606.50 = 606.50/x
3. Step 3: Cross multiply
   543.50x = 606.50 × 606.50
4. Step 4: Simplify right side
   543.50x = 367,842.25
5. Step 5: Solve for x
   x = 367,842.25/543.50
6. Step 6: Final answer
   x = 676.80