Finding the Third Proportional to 1,239,390 and 2,627,664

Step by Step Solution

1. Step 1: Write the proportion equation
   1,239,390 : 2,627,664 = 2,627,664 : x
2. Step 2: Convert to fraction form
   1,239,390/2,627,664 = 2,627,664/x
3. Step 3: Cross multiply
   1,239,390x = 2,627,664 × 2,627,664
4. Step 4: Simplify right side
   1,239,390x = 6,904,618,096,896
5. Step 5: Solve for x
   x = 6,904,618,096,896/1,239,390
6. Step 6: Final answer
   x = 5,570,980.96