Finding the Third Proportional to 311,530,062 and 664,756,818

Step by Step Solution

1. Step 1: Write the proportion equation
   311,530,062 : 664,756,818 = 664,756,818 : x
2. Step 2: Convert to fraction form
   311,530,062/664,756,818 = 664,756,818/x
3. Step 3: Cross multiply
   311,530,062x = 664,756,818 × 664,756,818
4. Step 4: Simplify right side
   311,530,062x = 441,901,627,077,485,120
5. Step 5: Solve for x
   x = 441,901,627,077,485,120/311,530,062
6. Step 6: Final answer
   x = 1,418,487,911.70