Finding the Third Proportional to 390.38 and 595.69

Step by Step Solution

1. Step 1: Write the proportion equation
   390.38 : 595.69 = 595.69 : x
2. Step 2: Convert to fraction form
   390.38/595.69 = 595.69/x
3. Step 3: Cross multiply
   390.38x = 595.69 × 595.69
4. Step 4: Simplify right side
   390.38x = 354,843.60
5. Step 5: Solve for x
   x = 354,843.60/390.38
6. Step 6: Final answer
   x = 908.98