Finding the Third Proportional to 643,344 and 1,359,264

Step by Step Solution

1. Step 1: Write the proportion equation
   643,344 : 1,359,264 = 1,359,264 : x
2. Step 2: Convert to fraction form
   643,344/1,359,264 = 1,359,264/x
3. Step 3: Cross multiply
   643,344x = 1,359,264 × 1,359,264
4. Step 4: Simplify right side
   643,344x = 1,847,598,621,696
5. Step 5: Solve for x
   x = 1,847,598,621,696/643,344
6. Step 6: Final answer
   x = 2,871,867.34