Finding the Third Proportional to 309,360 and 655,326

Step by Step Solution

1. Step 1: Write the proportion equation
   309,360 : 655,326 = 655,326 : x
2. Step 2: Convert to fraction form
   309,360/655,326 = 655,326/x
3. Step 3: Cross multiply
   309,360x = 655,326 × 655,326
4. Step 4: Simplify right side
   309,360x = 429,452,166,276
5. Step 5: Solve for x
   x = 429,452,166,276/309,360
6. Step 6: Final answer
   x = 1,388,195.52