Finding the Third Proportional to 257,300,571 and 397,572,042

Step by Step Solution

1. Step 1: Write the proportion equation
   257,300,571 : 397,572,042 = 397,572,042 : x
2. Step 2: Convert to fraction form
   257,300,571/397,572,042 = 397,572,042/x
3. Step 3: Cross multiply
   257,300,571x = 397,572,042 × 397,572,042
4. Step 4: Simplify right side
   257,300,571x = 158,063,528,580,049,760
5. Step 5: Solve for x
   x = 158,063,528,580,049,760/257,300,571
6. Step 6: Final answer
   x = 614,314,721.36