Finding the Third Proportional to 747,968 and 1,621,320

Step by Step Solution

1. Step 1: Write the proportion equation
   747,968 : 1,621,320 = 1,621,320 : x
2. Step 2: Convert to fraction form
   747,968/1,621,320 = 1,621,320/x
3. Step 3: Cross multiply
   747,968x = 1,621,320 × 1,621,320
4. Step 4: Simplify right side
   747,968x = 2,628,678,542,400
5. Step 5: Solve for x
   x = 2,628,678,542,400/747,968
6. Step 6: Final answer
   x = 3,514,426.48