Finding the Third Proportional to 345,265 and 738,499

Step by Step Solution

1. Step 1: Write the proportion equation
   345,265 : 738,499 = 738,499 : x
2. Step 2: Convert to fraction form
   345,265/738,499 = 738,499/x
3. Step 3: Cross multiply
   345,265x = 738,499 × 738,499
4. Step 4: Simplify right side
   345,265x = 545,380,773,001
5. Step 5: Solve for x
   x = 545,380,773,001/345,265
6. Step 6: Final answer
   x = 1,579,600.52