Finding the Third Proportional to 639,346 and 1,065,426

Step by Step Solution

1. Step 1: Write the proportion equation
   639,346 : 1,065,426 = 1,065,426 : x
2. Step 2: Convert to fraction form
   639,346/1,065,426 = 1,065,426/x
3. Step 3: Cross multiply
   639,346x = 1,065,426 × 1,065,426
4. Step 4: Simplify right side
   639,346x = 1,135,132,561,476
5. Step 5: Solve for x
   x = 1,135,132,561,476/639,346
6. Step 6: Final answer
   x = 1,775,458.92