Finding the Third Proportional to 1,299,520 and 2,019,968

Step by Step Solution

1. Step 1: Write the proportion equation
   1,299,520 : 2,019,968 = 2,019,968 : x
2. Step 2: Convert to fraction form
   1,299,520/2,019,968 = 2,019,968/x
3. Step 3: Cross multiply
   1,299,520x = 2,019,968 × 2,019,968
4. Step 4: Simplify right side
   1,299,520x = 4,080,270,721,024
5. Step 5: Solve for x
   x = 4,080,270,721,024/1,299,520
6. Step 6: Final answer
   x = 3,139,829.11