Finding the Third Proportional to 258,204,172 and 388,062,994

Step by Step Solution

1. Step 1: Write the proportion equation
   258,204,172 : 388,062,994 = 388,062,994 : x
2. Step 2: Convert to fraction form
   258,204,172/388,062,994 = 388,062,994/x
3. Step 3: Cross multiply
   258,204,172x = 388,062,994 × 388,062,994
4. Step 4: Simplify right side
   258,204,172x = 150,592,887,312,244,032
5. Step 5: Solve for x
   x = 150,592,887,312,244,032/258,204,172
6. Step 6: Final answer
   x = 583,231,812.82