Finding the Third Proportional to 713,440 and 978,300

Step by Step Solution

1. Step 1: Write the proportion equation
   713,440 : 978,300 = 978,300 : x
2. Step 2: Convert to fraction form
   713,440/978,300 = 978,300/x
3. Step 3: Cross multiply
   713,440x = 978,300 × 978,300
4. Step 4: Simplify right side
   713,440x = 957,070,890,000
5. Step 5: Solve for x
   x = 957,070,890,000/713,440
6. Step 6: Final answer
   x = 1,341,487.57