Finding the Third Proportional to 639,348 and 1,065,429

Step by Step Solution

1. Step 1: Write the proportion equation
   639,348 : 1,065,429 = 1,065,429 : x
2. Step 2: Convert to fraction form
   639,348/1,065,429 = 1,065,429/x
3. Step 3: Cross multiply
   639,348x = 1,065,429 × 1,065,429
4. Step 4: Simplify right side
   639,348x = 1,135,138,954,041
5. Step 5: Solve for x
   x = 1,135,138,954,041/639,348
6. Step 6: Final answer
   x = 1,775,463.37