Finding the Third Proportional to 639,739 and 1,368,046

Step by Step Solution

1. Step 1: Write the proportion equation
   639,739 : 1,368,046 = 1,368,046 : x
2. Step 2: Convert to fraction form
   639,739/1,368,046 = 1,368,046/x
3. Step 3: Cross multiply
   639,739x = 1,368,046 × 1,368,046
4. Step 4: Simplify right side
   639,739x = 1,871,549,858,116
5. Step 5: Solve for x
   x = 1,871,549,858,116/639,739
6. Step 6: Final answer
   x = 2,925,489.70