Finding the Third Proportional to 1,681,238 and 3,648,256

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681,238 : 3,648,256 = 3,648,256 : x
2. Step 2: Convert to fraction form
   1,681,238/3,648,256 = 3,648,256/x
3. Step 3: Cross multiply
   1,681,238x = 3,648,256 × 3,648,256
4. Step 4: Simplify right side
   1,681,238x = 13,309,771,841,536
5. Step 5: Solve for x
   x = 13,309,771,841,536/1,681,238
6. Step 6: Final answer
   x = 7,916,649.42