Finding the Third Proportional to 307.55 and 606.55

Step by Step Solution

1. Step 1: Write the proportion equation
   307.55 : 606.55 = 606.55 : x
2. Step 2: Convert to fraction form
   307.55/606.55 = 606.55/x
3. Step 3: Cross multiply
   307.55x = 606.55 × 606.55
4. Step 4: Simplify right side
   307.55x = 367,903.85
5. Step 5: Solve for x
   x = 367,903.85/307.55
6. Step 6: Final answer
   x = 1,196.25