Finding the Third Proportional to 643,346 and 1,359,268

Step by Step Solution

1. Step 1: Write the proportion equation
   643,346 : 1,359,268 = 1,359,268 : x
2. Step 2: Convert to fraction form
   643,346/1,359,268 = 1,359,268/x
3. Step 3: Cross multiply
   643,346x = 1,359,268 × 1,359,268
4. Step 4: Simplify right side
   643,346x = 1,847,609,495,824
5. Step 5: Solve for x
   x = 1,847,609,495,824/643,346
6. Step 6: Final answer
   x = 2,871,875.31