Finding the Third Proportional to 450,643.50 and 978,318

Step by Step Solution

1. Step 1: Write the proportion equation
   450,643.50 : 978,318 = 978,318 : x
2. Step 2: Convert to fraction form
   450,643.50/978,318 = 978,318/x
3. Step 3: Cross multiply
   450,643.50x = 978,318 × 978,318
4. Step 4: Simplify right side
   450,643.50x = 957,106,109,124
5. Step 5: Solve for x
   x = 957,106,109,124/450,643.50
6. Step 6: Final answer
   x = 2,123,865.34