Finding the Third Proportional to 664,212 and 1,057,410

Step by Step Solution

1. Step 1: Write the proportion equation
   664,212 : 1,057,410 = 1,057,410 : x
2. Step 2: Convert to fraction form
   664,212/1,057,410 = 1,057,410/x
3. Step 3: Cross multiply
   664,212x = 1,057,410 × 1,057,410
4. Step 4: Simplify right side
   664,212x = 1,118,115,908,100
5. Step 5: Solve for x
   x = 1,118,115,908,100/664,212
6. Step 6: Final answer
   x = 1,683,372.04