Finding the Third Proportional to 748,638 and 1,623,398

Step by Step Solution

1. Step 1: Write the proportion equation
   748,638 : 1,623,398 = 1,623,398 : x
2. Step 2: Convert to fraction form
   748,638/1,623,398 = 1,623,398/x
3. Step 3: Cross multiply
   748,638x = 1,623,398 × 1,623,398
4. Step 4: Simplify right side
   748,638x = 2,635,421,066,404
5. Step 5: Solve for x
   x = 2,635,421,066,404/748,638
6. Step 6: Final answer
   x = 3,520,287.60