Finding the Third Proportional to 311,530,056 and 664,756,806

Step by Step Solution

1. Step 1: Write the proportion equation
   311,530,056 : 664,756,806 = 664,756,806 : x
2. Step 2: Convert to fraction form
   311,530,056/664,756,806 = 664,756,806/x
3. Step 3: Cross multiply
   311,530,056x = 664,756,806 × 664,756,806
4. Step 4: Simplify right side
   311,530,056x = 441,901,611,123,321,664
5. Step 5: Solve for x
   x = 441,901,611,123,321,664/311,530,056
6. Step 6: Final answer
   x = 1,418,487,887.81