Finding the Third Proportional to 65,643,642 and 142,846,308

Step by Step Solution

1. Step 1: Write the proportion equation
   65,643,642 : 142,846,308 = 142,846,308 : x
2. Step 2: Convert to fraction form
   65,643,642/142,846,308 = 142,846,308/x
3. Step 3: Cross multiply
   65,643,642x = 142,846,308 × 142,846,308
4. Step 4: Simplify right side
   65,643,642x = 20,405,067,709,230,864
5. Step 5: Solve for x
   x = 20,405,067,709,230,864/65,643,642
6. Step 6: Final answer
   x = 310,846,063.50