Finding the Third Proportional to 664,238 and 1,057,448

Step by Step Solution

1. Step 1: Write the proportion equation
   664,238 : 1,057,448 = 1,057,448 : x
2. Step 2: Convert to fraction form
   664,238/1,057,448 = 1,057,448/x
3. Step 3: Cross multiply
   664,238x = 1,057,448 × 1,057,448
4. Step 4: Simplify right side
   664,238x = 1,118,196,272,704
5. Step 5: Solve for x
   x = 1,118,196,272,704/664,238
6. Step 6: Final answer
   x = 1,683,427.13