Finding the Third Proportional to 646,380 and 1,396,008

Step by Step Solution

1. Step 1: Write the proportion equation
   646,380 : 1,396,008 = 1,396,008 : x
2. Step 2: Convert to fraction form
   646,380/1,396,008 = 1,396,008/x
3. Step 3: Cross multiply
   646,380x = 1,396,008 × 1,396,008
4. Step 4: Simplify right side
   646,380x = 1,948,838,336,064
5. Step 5: Solve for x
   x = 1,948,838,336,064/646,380
6. Step 6: Final answer
   x = 3,015,004.08