Finding the Third Proportional to 443,353.50 and 687,902.63

Step by Step Solution

1. Step 1: Write the proportion equation
   443,353.50 : 687,902.63 = 687,902.63 : x
2. Step 2: Convert to fraction form
   443,353.50/687,902.63 = 687,902.63/x
3. Step 3: Cross multiply
   443,353.50x = 687,902.63 × 687,902.63
4. Step 4: Simplify right side
   443,353.50x = 473,210,021,481.89
5. Step 5: Solve for x
   x = 473,210,021,481.89/443,353.50
6. Step 6: Final answer
   x = 1,067,342.47