Finding the Third Proportional to 628,978 and 1,381,512

Step by Step Solution

1. Step 1: Write the proportion equation
   628,978 : 1,381,512 = 1,381,512 : x
2. Step 2: Convert to fraction form
   628,978/1,381,512 = 1,381,512/x
3. Step 3: Cross multiply
   628,978x = 1,381,512 × 1,381,512
4. Step 4: Simplify right side
   628,978x = 1,908,575,406,144
5. Step 5: Solve for x
   x = 1,908,575,406,144/628,978
6. Step 6: Final answer
   x = 3,034,407.25