Finding the Third Proportional to 748,643 and 1,623,406

Step by Step Solution

1. Step 1: Write the proportion equation
   748,643 : 1,623,406 = 1,623,406 : x
2. Step 2: Convert to fraction form
   748,643/1,623,406 = 1,623,406/x
3. Step 3: Cross multiply
   748,643x = 1,623,406 × 1,623,406
4. Step 4: Simplify right side
   748,643x = 2,635,447,040,836
5. Step 5: Solve for x
   x = 2,635,447,040,836/748,643
6. Step 6: Final answer
   x = 3,520,298.78