Finding the Third Proportional to 356,868 and 521,898

Step by Step Solution

1. Step 1: Write the proportion equation
   356,868 : 521,898 = 521,898 : x
2. Step 2: Convert to fraction form
   356,868/521,898 = 521,898/x
3. Step 3: Cross multiply
   356,868x = 521,898 × 521,898
4. Step 4: Simplify right side
   356,868x = 272,377,522,404
5. Step 5: Solve for x
   x = 272,377,522,404/356,868
6. Step 6: Final answer
   x = 763,244.46