Finding the Third Proportional to 404,342,987 and 577,816,665.50

Step by Step Solution

1. Step 1: Write the proportion equation
   404,342,987 : 577,816,665.50 = 577,816,665.50 : x
2. Step 2: Convert to fraction form
   404,342,987/577,816,665.50 = 577,816,665.50/x
3. Step 3: Cross multiply
   404,342,987x = 577,816,665.50 × 577,816,665.50
4. Step 4: Simplify right side
   404,342,987x = 333,872,098,929,538,880
5. Step 5: Solve for x
   x = 333,872,098,929,538,880/404,342,987
6. Step 6: Final answer
   x = 825,715,072.76