Finding the Third Proportional to 64,029,978 and 140,504,436

Step by Step Solution

1. Step 1: Write the proportion equation
   64,029,978 : 140,504,436 = 140,504,436 : x
2. Step 2: Convert to fraction form
   64,029,978/140,504,436 = 140,504,436/x
3. Step 3: Cross multiply
   64,029,978x = 140,504,436 × 140,504,436
4. Step 4: Simplify right side
   64,029,978x = 19,741,496,535,678,096
5. Step 5: Solve for x
   x = 19,741,496,535,678,096/64,029,978
6. Step 6: Final answer
   x = 308,316,466.01