Finding the Third Proportional to 664,234 and 1,057,440

Step by Step Solution

1. Step 1: Write the proportion equation
   664,234 : 1,057,440 = 1,057,440 : x
2. Step 2: Convert to fraction form
   664,234/1,057,440 = 1,057,440/x
3. Step 3: Cross multiply
   664,234x = 1,057,440 × 1,057,440
4. Step 4: Simplify right side
   664,234x = 1,118,179,353,600
5. Step 5: Solve for x
   x = 1,118,179,353,600/664,234
6. Step 6: Final answer
   x = 1,683,411.80