Finding the Third Proportional to 493,810 and 721,898

Step by Step Solution

1. Step 1: Write the proportion equation
   493,810 : 721,898 = 721,898 : x
2. Step 2: Convert to fraction form
   493,810/721,898 = 721,898/x
3. Step 3: Cross multiply
   493,810x = 721,898 × 721,898
4. Step 4: Simplify right side
   493,810x = 521,136,722,404
5. Step 5: Solve for x
   x = 521,136,722,404/493,810
6. Step 6: Final answer
   x = 1,055,338.54