Finding the Third Proportional to 639,722 and 956,063

Step by Step Solution

1. Step 1: Write the proportion equation
   639,722 : 956,063 = 956,063 : x
2. Step 2: Convert to fraction form
   639,722/956,063 = 956,063/x
3. Step 3: Cross multiply
   639,722x = 956,063 × 956,063
4. Step 4: Simplify right side
   639,722x = 914,056,459,969
5. Step 5: Solve for x
   x = 914,056,459,969/639,722
6. Step 6: Final answer
   x = 1,428,833.87