Finding the Third Proportional to 624,588 and 1,388,928

Step by Step Solution

1. Step 1: Write the proportion equation
   624,588 : 1,388,928 = 1,388,928 : x
2. Step 2: Convert to fraction form
   624,588/1,388,928 = 1,388,928/x
3. Step 3: Cross multiply
   624,588x = 1,388,928 × 1,388,928
4. Step 4: Simplify right side
   624,588x = 1,929,120,989,184
5. Step 5: Solve for x
   x = 1,929,120,989,184/624,588
6. Step 6: Final answer
   x = 3,088,629.61