Finding the Third Proportional to 1,398,354 and 2,123,307

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398,354 : 2,123,307 = 2,123,307 : x
2. Step 2: Convert to fraction form
   1,398,354/2,123,307 = 2,123,307/x
3. Step 3: Cross multiply
   1,398,354x = 2,123,307 × 2,123,307
4. Step 4: Simplify right side
   1,398,354x = 4,508,432,616,249
5. Step 5: Solve for x
   x = 4,508,432,616,249/1,398,354
6. Step 6: Final answer
   x = 3,224,099.63