Finding the Third Proportional to 713,439 and 978,298.50

Step by Step Solution

1. Step 1: Write the proportion equation
   713,439 : 978,298.50 = 978,298.50 : x
2. Step 2: Convert to fraction form
   713,439/978,298.50 = 978,298.50/x
3. Step 3: Cross multiply
   713,439x = 978,298.50 × 978,298.50
4. Step 4: Simplify right side
   713,439x = 957,067,955,102.25
5. Step 5: Solve for x
   x = 957,067,955,102.25/713,439
6. Step 6: Final answer
   x = 1,341,485.33