Finding the Third Proportional to 443,783 and 721,018

Step by Step Solution

1. Step 1: Write the proportion equation
   443,783 : 721,018 = 721,018 : x
2. Step 2: Convert to fraction form
   443,783/721,018 = 721,018/x
3. Step 3: Cross multiply
   443,783x = 721,018 × 721,018
4. Step 4: Simplify right side
   443,783x = 519,866,956,324
5. Step 5: Solve for x
   x = 519,866,956,324/443,783
6. Step 6: Final answer
   x = 1,171,444.05