Finding the Third Proportional to 286,808 and 443,868

Step by Step Solution

1. Step 1: Write the proportion equation
   286,808 : 443,868 = 443,868 : x
2. Step 2: Convert to fraction form
   286,808/443,868 = 443,868/x
3. Step 3: Cross multiply
   286,808x = 443,868 × 443,868
4. Step 4: Simplify right side
   286,808x = 197,018,801,424
5. Step 5: Solve for x
   x = 197,018,801,424/286,808
6. Step 6: Final answer
   x = 686,936.21