Finding the Third Proportional to 389,039,936 and 840,196,274

Step by Step Solution

1. Step 1: Write the proportion equation
   389,039,936 : 840,196,274 = 840,196,274 : x
2. Step 2: Convert to fraction form
   389,039,936/840,196,274 = 840,196,274/x
3. Step 3: Cross multiply
   389,039,936x = 840,196,274 × 840,196,274
4. Step 4: Simplify right side
   389,039,936x = 705,929,778,843,483,136
5. Step 5: Solve for x
   x = 705,929,778,843,483,136/389,039,936
6. Step 6: Final answer
   x = 1,814,543,221.71