Finding the Third Proportional to 342,336 and 708,648

Step by Step Solution

1. Step 1: Write the proportion equation
   342,336 : 708,648 = 708,648 : x
2. Step 2: Convert to fraction form
   342,336/708,648 = 708,648/x
3. Step 3: Cross multiply
   342,336x = 708,648 × 708,648
4. Step 4: Simplify right side
   342,336x = 502,181,987,904
5. Step 5: Solve for x
   x = 502,181,987,904/342,336
6. Step 6: Final answer
   x = 1,466,927.19