Finding the Third Proportional to 345,212 and 738,404

Step by Step Solution

1. Step 1: Write the proportion equation
   345,212 : 738,404 = 738,404 : x
2. Step 2: Convert to fraction form
   345,212/738,404 = 738,404/x
3. Step 3: Cross multiply
   345,212x = 738,404 × 738,404
4. Step 4: Simplify right side
   345,212x = 545,240,467,216
5. Step 5: Solve for x
   x = 545,240,467,216/345,212
6. Step 6: Final answer
   x = 1,579,436.60