Finding the Third Proportional to 628,960 and 837,978

Step by Step Solution

1. Step 1: Write the proportion equation
   628,960 : 837,978 = 837,978 : x
2. Step 2: Convert to fraction form
   628,960/837,978 = 837,978/x
3. Step 3: Cross multiply
   628,960x = 837,978 × 837,978
4. Step 4: Simplify right side
   628,960x = 702,207,128,484
5. Step 5: Solve for x
   x = 702,207,128,484/628,960
6. Step 6: Final answer
   x = 1,116,457.53