Finding the Third Proportional to 639,008 and 1,363,456

Step by Step Solution

1. Step 1: Write the proportion equation
   639,008 : 1,363,456 = 1,363,456 : x
2. Step 2: Convert to fraction form
   639,008/1,363,456 = 1,363,456/x
3. Step 3: Cross multiply
   639,008x = 1,363,456 × 1,363,456
4. Step 4: Simplify right side
   639,008x = 1,859,012,263,936
5. Step 5: Solve for x
   x = 1,859,012,263,936/639,008
6. Step 6: Final answer
   x = 2,909,215.95