Finding the Third Proportional to 643,936 and 1,407,536

Step by Step Solution

1. Step 1: Write the proportion equation
   643,936 : 1,407,536 = 1,407,536 : x
2. Step 2: Convert to fraction form
   643,936/1,407,536 = 1,407,536/x
3. Step 3: Cross multiply
   643,936x = 1,407,536 × 1,407,536
4. Step 4: Simplify right side
   643,936x = 1,981,157,591,296
5. Step 5: Solve for x
   x = 1,981,157,591,296/643,936
6. Step 6: Final answer
   x = 3,076,637.42