Finding the Third Proportional to 419,415,400 and 629,123,180

Step by Step Solution

1. Step 1: Write the proportion equation
   419,415,400 : 629,123,180 = 629,123,180 : x
2. Step 2: Convert to fraction form
   419,415,400/629,123,180 = 629,123,180/x
3. Step 3: Cross multiply
   419,415,400x = 629,123,180 × 629,123,180
4. Step 4: Simplify right side
   419,415,400x = 395,795,975,613,312,384
5. Step 5: Solve for x
   x = 395,795,975,613,312,384/419,415,400
6. Step 6: Final answer
   x = 943,684,890.00