Finding the Third Proportional to 831,212,129 and 1,807,105,378

Step by Step Solution

1. Step 1: Write the proportion equation
   831,212,129 : 1,807,105,378 = 1,807,105,378 : x
2. Step 2: Convert to fraction form
   831,212,129/1,807,105,378 = 1,807,105,378/x
3. Step 3: Cross multiply
   831,212,129x = 1,807,105,378 × 1,807,105,378
4. Step 4: Simplify right side
   831,212,129x = 3,265,629,847,196,523,008
5. Step 5: Solve for x
   x = 3,265,629,847,196,523,008/831,212,129
6. Step 6: Final answer
   x = 3,928,756,250.38