Finding the Third Proportional to 639,786 and 1,368,132

Step by Step Solution

1. Step 1: Write the proportion equation
   639,786 : 1,368,132 = 1,368,132 : x
2. Step 2: Convert to fraction form
   639,786/1,368,132 = 1,368,132/x
3. Step 3: Cross multiply
   639,786x = 1,368,132 × 1,368,132
4. Step 4: Simplify right side
   639,786x = 1,871,785,169,424
5. Step 5: Solve for x
   x = 1,871,785,169,424/639,786
6. Step 6: Final answer
   x = 2,925,642.59