Finding the Third Proportional to 643,853,700.70 and 1,394,670,427.59

Step by Step Solution

1. Step 1: Write the proportion equation
   643,853,700.70 : 1,394,670,427.59 = 1,394,670,427.59 : x
2. Step 2: Convert to fraction form
   643,853,700.70/1,394,670,427.59 = 1,394,670,427.59/x
3. Step 3: Cross multiply
   643,853,700.70x = 1,394,670,427.59 × 1,394,670,427.59
4. Step 4: Simplify right side
   643,853,700.70x = 1,945,105,601,604,673,024
5. Step 5: Solve for x
   x = 1,945,105,601,604,673,024/643,853,700.70
6. Step 6: Final answer
   x = 3,021,036,610.46