Finding the Third Proportional to 713,492 and 978,380

Step by Step Solution

1. Step 1: Write the proportion equation
   713,492 : 978,380 = 978,380 : x
2. Step 2: Convert to fraction form
   713,492/978,380 = 978,380/x
3. Step 3: Cross multiply
   713,492x = 978,380 × 978,380
4. Step 4: Simplify right side
   713,492x = 957,227,424,400
5. Step 5: Solve for x
   x = 957,227,424,400/713,492
6. Step 6: Final answer
   x = 1,341,609.19