Finding the Third Proportional to 300,435,168 and 640,553,724

Step by Step Solution

1. Step 1: Write the proportion equation
   300,435,168 : 640,553,724 = 640,553,724 : x
2. Step 2: Convert to fraction form
   300,435,168/640,553,724 = 640,553,724/x
3. Step 3: Cross multiply
   300,435,168x = 640,553,724 × 640,553,724
4. Step 4: Simplify right side
   300,435,168x = 410,309,073,330,268,160
5. Step 5: Solve for x
   x = 410,309,073,330,268,160/300,435,168
6. Step 6: Final answer
   x = 1,365,715,858.31