Finding the Third Proportional to 388.59 and 606.56

Step by Step Solution

1. Step 1: Write the proportion equation
   388.59 : 606.56 = 606.56 : x
2. Step 2: Convert to fraction form
   388.59/606.56 = 606.56/x
3. Step 3: Cross multiply
   388.59x = 606.56 × 606.56
4. Step 4: Simplify right side
   388.59x = 367,918.07
5. Step 5: Solve for x
   x = 367,918.07/388.59
6. Step 6: Final answer
   x = 946.79