Finding the Third Proportional to 643,392 and 1,413,684

Step by Step Solution

1. Step 1: Write the proportion equation
   643,392 : 1,413,684 = 1,413,684 : x
2. Step 2: Convert to fraction form
   643,392/1,413,684 = 1,413,684/x
3. Step 3: Cross multiply
   643,392x = 1,413,684 × 1,413,684
4. Step 4: Simplify right side
   643,392x = 1,998,502,451,856
5. Step 5: Solve for x
   x = 1,998,502,451,856/643,392
6. Step 6: Final answer
   x = 3,106,197.24