Finding the Third Proportional to 258,204,168 and 388,062,988

Step by Step Solution

1. Step 1: Write the proportion equation
   258,204,168 : 388,062,988 = 388,062,988 : x
2. Step 2: Convert to fraction form
   258,204,168/388,062,988 = 388,062,988/x
3. Step 3: Cross multiply
   258,204,168x = 388,062,988 × 388,062,988
4. Step 4: Simplify right side
   258,204,168x = 150,592,882,655,488,128
5. Step 5: Solve for x
   x = 150,592,882,655,488,128/258,204,168
6. Step 6: Final answer
   x = 583,231,803.82