Finding the Third Proportional to 388,313,848 and 831,897,560

Step by Step Solution

1. Step 1: Write the proportion equation
   388,313,848 : 831,897,560 = 831,897,560 : x
2. Step 2: Convert to fraction form
   388,313,848/831,897,560 = 831,897,560/x
3. Step 3: Cross multiply
   388,313,848x = 831,897,560 × 831,897,560
4. Step 4: Simplify right side
   388,313,848x = 692,053,550,333,953,536
5. Step 5: Solve for x
   x = 692,053,550,333,953,536/388,313,848
6. Step 6: Final answer
   x = 1,782,201,572.00