Finding the Third Proportional to 764,721 and 1,680,426

Step by Step Solution

1. Step 1: Write the proportion equation
   764,721 : 1,680,426 = 1,680,426 : x
2. Step 2: Convert to fraction form
   764,721/1,680,426 = 1,680,426/x
3. Step 3: Cross multiply
   764,721x = 1,680,426 × 1,680,426
4. Step 4: Simplify right side
   764,721x = 2,823,831,541,476
5. Step 5: Solve for x
   x = 2,823,831,541,476/764,721
6. Step 6: Final answer
   x = 3,692,629.78