Finding the Third Proportional to 646,352 and 1,388,656

Step by Step Solution

1. Step 1: Write the proportion equation
   646,352 : 1,388,656 = 1,388,656 : x
2. Step 2: Convert to fraction form
   646,352/1,388,656 = 1,388,656/x
3. Step 3: Cross multiply
   646,352x = 1,388,656 × 1,388,656
4. Step 4: Simplify right side
   646,352x = 1,928,365,486,336
5. Step 5: Solve for x
   x = 1,928,365,486,336/646,352
6. Step 6: Final answer
   x = 2,983,460.23