Finding the Third Proportional to 336,384 and 723,648

Step by Step Solution

1. Step 1: Write the proportion equation
   336,384 : 723,648 = 723,648 : x
2. Step 2: Convert to fraction form
   336,384/723,648 = 723,648/x
3. Step 3: Cross multiply
   336,384x = 723,648 × 723,648
4. Step 4: Simplify right side
   336,384x = 523,666,427,904
5. Step 5: Solve for x
   x = 523,666,427,904/336,384
6. Step 6: Final answer
   x = 1,556,751.89