Finding the Third Proportional to 1,390,256 and 2,149,232

Step by Step Solution

1. Step 1: Write the proportion equation
   1,390,256 : 2,149,232 = 2,149,232 : x
2. Step 2: Convert to fraction form
   1,390,256/2,149,232 = 2,149,232/x
3. Step 3: Cross multiply
   1,390,256x = 2,149,232 × 2,149,232
4. Step 4: Simplify right side
   1,390,256x = 4,619,198,189,824
5. Step 5: Solve for x
   x = 4,619,198,189,824/1,390,256
6. Step 6: Final answer
   x = 3,322,552.24