Finding the Third Proportional to 642,879,610 and 1,395,354,164

Step by Step Solution

1. Step 1: Write the proportion equation
   642,879,610 : 1,395,354,164 = 1,395,354,164 : x
2. Step 2: Convert to fraction form
   642,879,610/1,395,354,164 = 1,395,354,164/x
3. Step 3: Cross multiply
   642,879,610x = 1,395,354,164 × 1,395,354,164
4. Step 4: Simplify right side
   642,879,610x = 1,947,013,242,992,139,008
5. Step 5: Solve for x
   x = 1,947,013,242,992,139,008/642,879,610
6. Step 6: Final answer
   x = 3,028,581,421.32