Finding the Third Proportional to 642,696 and 1,357,632

Step by Step Solution

1. Step 1: Write the proportion equation
   642,696 : 1,357,632 = 1,357,632 : x
2. Step 2: Convert to fraction form
   642,696/1,357,632 = 1,357,632/x
3. Step 3: Cross multiply
   642,696x = 1,357,632 × 1,357,632
4. Step 4: Simplify right side
   642,696x = 1,843,164,647,424
5. Step 5: Solve for x
   x = 1,843,164,647,424/642,696
6. Step 6: Final answer
   x = 2,867,863.88