Finding the Third Proportional to 320,436 and 693,468

Step by Step Solution

1. Step 1: Write the proportion equation
   320,436 : 693,468 = 693,468 : x
2. Step 2: Convert to fraction form
   320,436/693,468 = 693,468/x
3. Step 3: Cross multiply
   320,436x = 693,468 × 693,468
4. Step 4: Simplify right side
   320,436x = 480,897,867,024
5. Step 5: Solve for x
   x = 480,897,867,024/320,436
6. Step 6: Final answer
   x = 1,500,761.05