Finding the Third Proportional to 653,020 and 989,388

Step by Step Solution

1. Step 1: Write the proportion equation
   653,020 : 989,388 = 989,388 : x
2. Step 2: Convert to fraction form
   653,020/989,388 = 989,388/x
3. Step 3: Cross multiply
   653,020x = 989,388 × 989,388
4. Step 4: Simplify right side
   653,020x = 978,888,614,544
5. Step 5: Solve for x
   x = 978,888,614,544/653,020
6. Step 6: Final answer
   x = 1,499,017.82