Finding the Third Proportional to 572,018 and 855,003

Step by Step Solution

1. Step 1: Write the proportion equation
   572,018 : 855,003 = 855,003 : x
2. Step 2: Convert to fraction form
   572,018/855,003 = 855,003/x
3. Step 3: Cross multiply
   572,018x = 855,003 × 855,003
4. Step 4: Simplify right side
   572,018x = 731,030,130,009
5. Step 5: Solve for x
   x = 731,030,130,009/572,018
6. Step 6: Final answer
   x = 1,277,984.49