Finding the Third Proportional to 501,971 and 978,720

Step by Step Solution

1. Step 1: Write the proportion equation
   501,971 : 978,720 = 978,720 : x
2. Step 2: Convert to fraction form
   501,971/978,720 = 978,720/x
3. Step 3: Cross multiply
   501,971x = 978,720 × 978,720
4. Step 4: Simplify right side
   501,971x = 957,892,838,400
5. Step 5: Solve for x
   x = 957,892,838,400/501,971
6. Step 6: Final answer
   x = 1,908,263.30