Finding the Third Proportional to 726,638 and 1,697,213

Step by Step Solution

1. Step 1: Write the proportion equation
   726,638 : 1,697,213 = 1,697,213 : x
2. Step 2: Convert to fraction form
   726,638/1,697,213 = 1,697,213/x
3. Step 3: Cross multiply
   726,638x = 1,697,213 × 1,697,213
4. Step 4: Simplify right side
   726,638x = 2,880,531,967,369
5. Step 5: Solve for x
   x = 2,880,531,967,369/726,638
6. Step 6: Final answer
   x = 3,964,191.20