Finding the Third Proportional to 257,300,554 and 397,572,012

Step by Step Solution

1. Step 1: Write the proportion equation
   257,300,554 : 397,572,012 = 397,572,012 : x
2. Step 2: Convert to fraction form
   257,300,554/397,572,012 = 397,572,012/x
3. Step 3: Cross multiply
   257,300,554x = 397,572,012 × 397,572,012
4. Step 4: Simplify right side
   257,300,554x = 158,063,504,725,728,128
5. Step 5: Solve for x
   x = 158,063,504,725,728,128/257,300,554
6. Step 6: Final answer
   x = 614,314,669.24