Finding the Third Proportional to 624,128 and 1,344,390

Step by Step Solution

1. Step 1: Write the proportion equation
   624,128 : 1,344,390 = 1,344,390 : x
2. Step 2: Convert to fraction form
   624,128/1,344,390 = 1,344,390/x
3. Step 3: Cross multiply
   624,128x = 1,344,390 × 1,344,390
4. Step 4: Simplify right side
   624,128x = 1,807,384,472,100
5. Step 5: Solve for x
   x = 1,807,384,472,100/624,128
6. Step 6: Final answer
   x = 2,895,855.45