Finding the Third Proportional to 653,023 and 989,390

Step by Step Solution

1. Step 1: Write the proportion equation
   653,023 : 989,390 = 989,390 : x
2. Step 2: Convert to fraction form
   653,023/989,390 = 989,390/x
3. Step 3: Cross multiply
   653,023x = 989,390 × 989,390
4. Step 4: Simplify right side
   653,023x = 978,892,572,100
5. Step 5: Solve for x
   x = 978,892,572,100/653,023
6. Step 6: Final answer
   x = 1,499,016.99