Finding the Third Proportional to 646,464 and 1,375,872

Step by Step Solution

1. Step 1: Write the proportion equation
   646,464 : 1,375,872 = 1,375,872 : x
2. Step 2: Convert to fraction form
   646,464/1,375,872 = 1,375,872/x
3. Step 3: Cross multiply
   646,464x = 1,375,872 × 1,375,872
4. Step 4: Simplify right side
   646,464x = 1,893,023,760,384
5. Step 5: Solve for x
   x = 1,893,023,760,384/646,464
6. Step 6: Final answer
   x = 2,928,274.06