Finding the Third Proportional to 642,958 and 1,382,690

Step by Step Solution

1. Step 1: Write the proportion equation
   642,958 : 1,382,690 = 1,382,690 : x
2. Step 2: Convert to fraction form
   642,958/1,382,690 = 1,382,690/x
3. Step 3: Cross multiply
   642,958x = 1,382,690 × 1,382,690
4. Step 4: Simplify right side
   642,958x = 1,911,831,636,100
5. Step 5: Solve for x
   x = 1,911,831,636,100/642,958
6. Step 6: Final answer
   x = 2,973,493.81