Finding the Third Proportional to 512,356,078.69 and 787,178,467.69

Step by Step Solution

1. Step 1: Write the proportion equation
   512,356,078.69 : 787,178,467.69 = 787,178,467.69 : x
2. Step 2: Convert to fraction form
   512,356,078.69/787,178,467.69 = 787,178,467.69/x
3. Step 3: Cross multiply
   512,356,078.69x = 787,178,467.69 × 787,178,467.69
4. Step 4: Simplify right side
   512,356,078.69x = 619,649,939,990,840,448
5. Step 5: Solve for x
   x = 619,649,939,990,840,448/512,356,078.69
6. Step 6: Final answer
   x = 1,209,412,683.42