Finding the Third Proportional to 443,362 and 687,915

Step by Step Solution

1. Step 1: Write the proportion equation
   443,362 : 687,915 = 687,915 : x
2. Step 2: Convert to fraction form
   443,362/687,915 = 687,915/x
3. Step 3: Cross multiply
   443,362x = 687,915 × 687,915
4. Step 4: Simplify right side
   443,362x = 473,227,047,225
5. Step 5: Solve for x
   x = 473,227,047,225/443,362
6. Step 6: Final answer
   x = 1,067,360.41