Finding the Third Proportional to 642,956 and 1,382,686

Step by Step Solution

1. Step 1: Write the proportion equation
   642,956 : 1,382,686 = 1,382,686 : x
2. Step 2: Convert to fraction form
   642,956/1,382,686 = 1,382,686/x
3. Step 3: Cross multiply
   642,956x = 1,382,686 × 1,382,686
4. Step 4: Simplify right side
   642,956x = 1,911,820,574,596
5. Step 5: Solve for x
   x = 1,911,820,574,596/642,956
6. Step 6: Final answer
   x = 2,973,485.86