Finding the Third Proportional to 419,415,404 and 629,123,186

Step by Step Solution

1. Step 1: Write the proportion equation
   419,415,404 : 629,123,186 = 629,123,186 : x
2. Step 2: Convert to fraction form
   419,415,404/629,123,186 = 629,123,186/x
3. Step 3: Cross multiply
   419,415,404x = 629,123,186 × 629,123,186
4. Step 4: Simplify right side
   419,415,404x = 395,795,983,162,790,592
5. Step 5: Solve for x
   x = 395,795,983,162,790,592/419,415,404
6. Step 6: Final answer
   x = 943,684,899.00