Finding the Third Proportional to 624,636 and 988,116

Step by Step Solution

1. Step 1: Write the proportion equation
   624,636 : 988,116 = 988,116 : x
2. Step 2: Convert to fraction form
   624,636/988,116 = 988,116/x
3. Step 3: Cross multiply
   624,636x = 988,116 × 988,116
4. Step 4: Simplify right side
   624,636x = 976,373,229,456
5. Step 5: Solve for x
   x = 976,373,229,456/624,636
6. Step 6: Final answer
   x = 1,563,107.52