Finding the Third Proportional to 713,419 and 978,274.50

Step by Step Solution

1. Step 1: Write the proportion equation
   713,419 : 978,274.50 = 978,274.50 : x
2. Step 2: Convert to fraction form
   713,419/978,274.50 = 978,274.50/x
3. Step 3: Cross multiply
   713,419x = 978,274.50 × 978,274.50
4. Step 4: Simplify right side
   713,419x = 957,020,997,350.25
5. Step 5: Solve for x
   x = 957,020,997,350.25/713,419
6. Step 6: Final answer
   x = 1,341,457.12