Finding the Third Proportional to 311,530,054 and 664,756,801.50

Step by Step Solution

1. Step 1: Write the proportion equation
   311,530,054 : 664,756,801.50 = 664,756,801.50 : x
2. Step 2: Convert to fraction form
   311,530,054/664,756,801.50 = 664,756,801.50/x
3. Step 3: Cross multiply
   311,530,054x = 664,756,801.50 × 664,756,801.50
4. Step 4: Simplify right side
   311,530,054x = 441,901,605,140,510,400
5. Step 5: Solve for x
   x = 441,901,605,140,510,400/311,530,054
6. Step 6: Final answer
   x = 1,418,487,877.71