Finding the Third Proportional to 443,968 and 721,316

Step by Step Solution

1. Step 1: Write the proportion equation
   443,968 : 721,316 = 721,316 : x
2. Step 2: Convert to fraction form
   443,968/721,316 = 721,316/x
3. Step 3: Cross multiply
   443,968x = 721,316 × 721,316
4. Step 4: Simplify right side
   443,968x = 520,296,771,856
5. Step 5: Solve for x
   x = 520,296,771,856/443,968
6. Step 6: Final answer
   x = 1,171,924.04