Finding the Third Proportional to 643,592 and 1,397,898

Step by Step Solution

1. Step 1: Write the proportion equation
   643,592 : 1,397,898 = 1,397,898 : x
2. Step 2: Convert to fraction form
   643,592/1,397,898 = 1,397,898/x
3. Step 3: Cross multiply
   643,592x = 1,397,898 × 1,397,898
4. Step 4: Simplify right side
   643,592x = 1,954,118,818,404
5. Step 5: Solve for x
   x = 1,954,118,818,404/643,592
6. Step 6: Final answer
   x = 3,036,269.59