Finding the Third Proportional to 713,440.50 and 978,300.75

Step by Step Solution

1. Step 1: Write the proportion equation
   713,440.50 : 978,300.75 = 978,300.75 : x
2. Step 2: Convert to fraction form
   713,440.50/978,300.75 = 978,300.75/x
3. Step 3: Cross multiply
   713,440.50x = 978,300.75 × 978,300.75
4. Step 4: Simplify right side
   713,440.50x = 957,072,357,450.56
5. Step 5: Solve for x
   x = 957,072,357,450.56/713,440.50
6. Step 6: Final answer
   x = 1,341,488.68