Finding the Third Proportional to 639,961 and 1,374,895

Step by Step Solution

1. Step 1: Write the proportion equation
   639,961 : 1,374,895 = 1,374,895 : x
2. Step 2: Convert to fraction form
   639,961/1,374,895 = 1,374,895/x
3. Step 3: Cross multiply
   639,961x = 1,374,895 × 1,374,895
4. Step 4: Simplify right side
   639,961x = 1,890,336,261,025
5. Step 5: Solve for x
   x = 1,890,336,261,025/639,961
6. Step 6: Final answer
   x = 2,953,830.41